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Improving Stem Cell Techniques Using Protein Found In Moss

September 30, 2009

Hikers know that moss on a tree trunk always points north. According to new research by Israeli and German scientists, this ancient plant may also provide a new “compass” for stem cell research, telling scientists how better to program stem cells for medical purposes.

Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciences and Prof. Ralf Reski of the University of Freiburg have discovered a new use for the Polycomb group proteins (PcG) found in moss. They reported their findings recently in the journalDevelopment. PcG proteins play an important role in telling stem cells how to develop, they believe. The research is being funded by the German-Israeli Foundation.

Moss is a kind of plant that shares basic development processes with those found in humans. “We may not have found the switch that turns stem cells into tissue,” comments Dr. Ohad, “but we have found a key component which makes this switch work.”

Stopping the runaway gene

In their new paper, the researchers describe an ancient mechanism that alters the way DNA organizes inside the cell nucleus, which in turn, affects gene expression. This finding has important implications in stem cell therapies, which can go awry if implanted stem cells aren’t reprogrammed properly.

The researchers examined the “central regulatory function” of the PcG complex and how it programs an organism’s development, including the first divisions of cells as a new organism is born. Insights from this research have implications for plant and human development alike, and with time could be applied to cancer research. “As far as we know, there are some instances in cancer where the cellular mechanisms are defective or impaired,” Dr. Ohad says. “When this happens, it can lead to the misregulation of the genetic code, which can then lead to the breakdown of a healthy cell.”

He adds that this “switch,” which ensures the proper development of the organism, emerged early in the evolution of all organisms with a nucleus and organized DNA, long before animals and plants evolved into vastly different species and genera.

Towards a less “moss-ist” world

In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms. But Dr. Ohad defends mosses as highly adaptive organisms, which after 450 million years are still with us. “The original moss — Physcomitrella patens — hasn’t endured all these years, but its descendents have,” he says. He adds that the study of the biology of moss is similar to the study of the biology of other ancient creatures, like crocodiles and flies, helping scientists to understand the evolution and function of basic biological mechanisms.

The researchers suggest that the basic function of the PcG mechanism in moss, common to its function in plants and humans, is in regulating cell differentiation, describing the point at which a stem cell “decides” to become a leaf or flower, for example.

“As they develop, stem cells go from having a non-defined function to a specific one,” says Dr. Ohad. “If you don’t know how to manipulate the type of tissue you want to modulate, replace or heal, you might cause the malfunction of another type of tissue.”

According to Dr. Ohad, this research has direct implications for the study of plant biology, providing basic information on how the plant body and reproduction are regulated. It gives science a tool to control tissue specification, timing of reproduction and the development of traits in seeds that serve as the source for human and animal feed.

Comments

73 Responses to “Improving Stem Cell Techniques Using Protein Found In Moss”

  1. Anthony Pellegrini 1st period on October 5th, 2009 5:29 pm

    1. The ancient plant in the picture below can porvide a compass for stem cell research.
    2.Humans share basic development processes with a moss plant.
    3.In some scientific disciplines moss is considered as low class.
    4.Stem cells go from having a non-defined functionn to a specific one.

  2. Elizabeth Sanders 1st period on October 11th, 2009 12:18 pm

    Article Summary for October 12, 2009

    Moss on a tree trunk always points north.

    Moss is a kind of plant that shares basic development process with those found in humans.

    Moss have been around 450 million years.

    As they develop cells go from having a non-defined function to a specific one.

    PcG proteins play an important role in telling stem cells how to develop.

  3. Andrew Rice on October 11th, 2009 3:27 pm

    Andrew Rice Oct.11 5th period

    1.Moss on a tree trunk means north.

    2.Moss is very old and helpful.

    3.Dr. Nir Ohad discoverd that moss has (PcG) protiens.

    4.The protiens helps the plants by directing them on how to grow.

    5.Moss shares basic development with humans.

  4. Tonya Heathington 1st period on October 11th, 2009 6:31 pm

    this is about improving stem cell techniques.
    1.Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciences and Prof. Ralf Reski of the University of Freiburg have discovered a new use for the Polycomb group proteins (PcG) found in moss.
    2.Moss is a kind of plant that shares basic development processes with those found in humans.
    3.This finding has important implications in stem cell therapies, which can go awry if implanted stem cells aren’t reprogrammed properly.
    4.In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms
    5.“As they develop, stem cells go from having a non-defined function to a specific one,” says Dr. Ohad.

  5. Kaila Poleon 4th period on October 12th, 2009 7:48 am

    1. According to research by Israeli and German scientists, this plant might provide a “compas” for stem cell research.

    2. Moss sort of like a plant that shares basic development processes with the ones found in humans

    3. Insights from research have implications for both plant and human development , and with time could be applied to cancer research.

    4. As they grow, stem cells go from having a non-defined function to a specific one

    5. This information gives science a tool to control tissue specification, timing of reproduction and the growthment of traits in seeds that work as the source for human and animal food.

  6. Ruhinder Singh 2 period on October 12th, 2009 8:02 am

    1.Hikers know where north is by the moss on trees.
    2.Scientist have discovered a new use for the Polycomb group proteins (PcG) found in mossScientist.
    I3.n some scientific disciplines, mosses are considered lower-class,or less advanced, organisms.
    4.As they develop, stem cells go from having a non-defined function to a specific one
    5.Moss is a kind of plant that shares basic development processes with those found in humans

  7. savannah meagher-2nd on October 12th, 2009 9:02 am

    1.Hikers know that moss on a tree trunk always points north.
    2.Moss is a kind of plant that shares basic developement processes with those found in humans.
    3.Insights from this research implications from plant and human developement alike, and with time could be applied to cancer research.
    4.In some scientific disciplines, mosses are considered “lower-class” or less advanced organisms.
    5.According to Dr. Ohad, this research has direct implications for the study of plant biology, providing basic information on how the plant body and reproduction are regulated.

  8. Ktis Levasseur 2nd period on October 12th, 2009 10:40 am

    1.Hikers know where north is by the moss on trees.
    2.Moss sort of like a plant that shares basic development processes with the ones found in humans.
    3.“As they develop, stem cells go from having a non-defined function to a specific one,” says Dr. Ohad.
    4.This finding has important implications in stem cell therapies, which can go awry if implanted stem cells aren’t reprogrammed properly.
    5.In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms.

  9. Andrew Crisp 1st period on October 12th, 2009 1:22 pm

    1.The researchers examined the “central regulatory function” of the PcG complex and how it programs an organism’s development.
    2.In some scientific disciplines, mosses are considered less advanced organisms.
    3.The researchers suggest that the basic function of the PcG mechanism in moss, common to its function in plants and humans.
    4.According to Dr. Ohad, this research has direct implications for the study of plant biology.
    5.It gives science a tool to control tissue specification, timing of reproduction and the development of traits in seeds that serve as the source for human and animal feed.

  10. Matthew Eppard 1st period on October 12th, 2009 1:27 pm

    1.Hikers know that moss on a tree trunk always points north.
    2.According to new research by Israeli and German scientists, this ancient plant may also provide a new “compass” for stem cell research.
    3.Tellling scientists how better to program stem cells for medical purposes.
    4.Dr. Ohad and Professor Reski have discovered a new use for the Polycomb group proteins (PcG) found in moss.
    5.PcG proteins play an important role in telling stem cells how to develop, they believe. The research is being funded by the German-Israeli Foundation.

  11. Drake Horner 1st on October 12th, 2009 1:35 pm

    1.Moss on a tree trunk always will point North
    2.An Ancient plant named May might provide a new compass for stem cell research
    3.The protein on the plant can be very helpful beacuse it helps them grow the right way
    4.In some scientific disciplines moss is considered Low class
    5.When they grow stem cells go from having a nondefined function to a specific one

  12. Celia Farrell-1st period on October 12th, 2009 1:52 pm

    1. Moss on a tree trunk always points North.

    2. Moss may provide a new “compass” for stem cell research, telling scientist how better to program stem cells for medical purposes.

    3. Dr. Nir Ohad and Proffesor Ralf Reski have discovered a new use for the Polycomb group proteins found in moss.

    4. Moss is a kind of plant that shares basic development processes with those
    found in humans.

    5. Stems go from having a non-defined function to a specific one.

  13. Logan Knox 2nd on October 12th, 2009 2:32 pm

    (1)Moss always points north on a tree.

    (2)Moss shares basic development with humans.

    (3)In some scientific disciplines moss is considered as low class.

    (4)Scientist have discovered a new use for the Polycomb group proteins (PcG) found in mossScientist.

    (5)Moss have been around 450 million years.

  14. Caroline Whorton on October 12th, 2009 3:52 pm

    Moss on a tree trunck always points north.
    Moss is also shares basic development process.
    Scientists find their research or finding in a journal called Development.
    Scientists say that there is a protein called PcG in moss.
    The research that the scientists find is funded by the German-Israeli Foundation.

  15. Will Cook 4th period on October 12th, 2009 4:14 pm

    10-11-09

    Israeli and German scienstists believe that the moss may provide a ‘compass’ for new stem cell research. It turns out that moss is a plant that shares basic development processes with the ones found in humans. Since moss has both plant and human developments, it can be used in cancer research. In many scientific disciplines, moss is considered “lower class.” Dr. Ohad disagrees saying that moss is a very advanced, and adapted species.

  16. Zach Bennett - 1st Period on October 12th, 2009 4:17 pm

    when hikers go hiking they know that moss on trees mean north

    it shares basic development process

    moss is considered a low class

    moss is a very old plant scientist say it is about 450,000,000 year old

    moss makes cells by non defined function

  17. takara alexander 5th pd on October 12th, 2009 4:21 pm

    1.hikers know where north is by the moss of the trees
    2.scientists have discovered a new use for the Polycomb group proteins
    3.moss is a kind of plant that shares basic development processes found in humans
    4. the research examined a the central regulatory function
    5.the ancient plant can provide a new compass

  18. Avery Wilson 4th per. on October 12th, 2009 5:07 pm

    Moss in a tree always points north.
    Moss may provide a new compass for stem cell research.
    A “switch” will ensure proper development of the organism.
    Moss are considered lower class organsisms.
    This provides basic information on how the plant body and reproduction are regulated.

  19. Abby Hicks 1st period on October 12th, 2009 6:28 pm

    This article is about improving stem cell techniques using protein found in moss. Moss on tree trunks points north all the time. Israeli and German scientists have found that moss might provide a recent ”compass” for research on stem cells. Moss shares general development steps with those found in people. PcG is a regulatory gene found in plants and animals. By studying the PcG gene in moss, researchers hope to gain insight into cell reproduction in death.

  20. Taylor Brown Period 5 on October 12th, 2009 7:07 pm

    1.Researchers examine moss to look for clues in their stem cell research.
    2.Moss is a plant that has the development that humans do.
    3.They have not found out how the stem cells turn into tissue.
    4.From rcent studies they found the way that DNA organizes in the nucleus of the cell.
    5.All mosses are considered lower class organisms.

  21. Dylan Clark 4th period on October 12th, 2009 7:43 pm

    1) Moss may provide a new compass for stem cell reseaarch, telling scientists how better to program stem cells for medicals purposes.
    2) Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciences and Prof. Ralf Reski of the University of Freiburg have found a new use for the Polycomb
    group proteins that are in moss.
    3) They reported their discoveries recently in the journal Development.
    4) Polycomb group proteins proteins play an important part in telling stem cells how to grow and form, they think.
    5) Moss is a type of plant that shares basic development processes with those known to be in humans.

  22. John Parvin McBride-2nd on October 12th, 2009 7:53 pm

    1.) Moss on a tree always points North.
    2.) Scientist have found a medical purpose for moss.
    3.) Moss is a kind of plant that shares basic development processes with those found in humans.
    4.) Some scientific disciplines, mosses are considered lower-class,or less advanced, organisms
    5.) The researchers examined the “central regulatory function” of the PcG complex and how it programs an organism’s development, including the first divisions of cells as a new organism is born.

  23. John baudendistel - 4 on October 12th, 2009 7:58 pm

    - Hikers know where the north is by moth on trees
    - Moss growth is alit like humans.
    - Moss has been around for 450mill. Years.
    - Moss is very useful for survival.
    - As they grow, stem cells go from having a non-defined function to a specific one.

  24. Kaylee THom 4 on October 12th, 2009 8:18 pm

    1. Hikers can find which way is north by moss.
    2. Scientists found a new use for PcG in Polycomb proteins found in moss.
    3. Moss uses the basic development processes as humans.
    4. Mosses are usually the less advanced organisms in study.
    5. Dr. Ohad thinks that mosses are highly adaptable.

  25. Devin Platts 1st period on October 12th, 2009 8:25 pm

    1.The ancient plant can provide a compass for stem cell research.
    2. When the plant grows the stem cells form into one specific cell.
    3. Moss has been on Earth for about 450 million years.
    4. Moss is like a plant because it grows in a humans body.
    5. This research has direct implications for the study of plants.

  26. Connor Ferguson 2nd period on October 12th, 2009 8:57 pm

    1.Moss on a tree always faces North.

    2.Moss shares basic development with those found in humans.

    3.the reseachers found a way that alters the dna organizes inside the cell nucleus which effects gene expression.

    4.this research provides basic information on how the plant body and reproduction are regulated.

    5.Moss has been around on the earth for 450 million years

  27. deondre surles6th period on October 12th, 2009 9:02 pm

    The ancient plant shows which way is north.

    Ralph Reski learned there is protein in moss.

    Moss is a kind of plant that shares basic developement processes with those found in humans.

    The first division of cells as a new organism is born.

    They reported their findings recently in the journal Developement.

  28. Ryan Chamberlain 1st Period :D on October 12th, 2009 9:32 pm

    Article Summary:

    1.Moss on a tree trunk points north
    2.Dr. Nir Ohad discovered a new use for the Polycomb group proteins found in moss.
    3. Moss is very helpful to us and very old
    4. Moss Shares Basic Development with humans
    5. Moss could also help us like a compass

  29. Marilyn L. 6th 12-October-09 on October 12th, 2009 9:37 pm

    1.Moss shares basic development process with those found in humans.
    2.Moss on a tree means heading north or you are in the north.
    3.As moss develop cells go from having a non-defined function to a specific one.
    4.PcG proteins play an important role in telling stem cells how to develop.
    5..In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms
    Hey Mrs. Davis

  30. Amari Anderson period 1 on October 19th, 2009 7:42 am

    1. moss shares basic development as humans

    2.moss shows the direction of north

    3.moss has been around for 450 million years

    4. scientist have found medical purposes in moss.

    5.moss is considered a lower class organism

  31. Xavier Robinson on October 19th, 2009 5:03 pm

    1) People know where the north is by moth on trees
    2) Moss grows alot like humans do.
    3) Moss has been around for 450 million years.
    4) Scientist have found medical purposes for moss.
    5) Moss makes cells by non-defined functions.

  32. Xavier Robinson on October 19th, 2009 5:05 pm

    1) People know which direction north is by moss on trees.
    2) Moss grows alot like humans do.
    3) Moss has been around for 450 million years.
    4) Scientist have found medical purposes for moss.
    5) Moss makes cells by non-defined functions.

  33. DaMaRiS beltran 2nd 10/19/09 on October 19th, 2009 5:37 pm

    *~ 1. Moss on a tree trunk means North

    %~ 2. Moss could also help us like a compass.
    ]
    &*~ 3. Moss is a kind of plant that shares basic development processes with those found in humans.

    ($~* 4. Moss is a kind of plant that shares basic development processes with those found in humans.

    ^:%~ 5. They have not found out how the stem cells turn into tissue.

    MRs.DaVIs YoU aRe ThE Be$t!!!!!!!!! I LiKe YoU mOrE ThEn MaRilYn DoEs!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  34. austin xayavong 5th on October 25th, 2009 10:01 pm

    1.People no that moss all ways points north.
    2.This plant is a new sorce to cells.

  35. Cassidy McCarter-4th on October 26th, 2009 3:56 pm

    Hikers know that moss on a tree trunk always points north. According to new research by Israeli and German scientists, this ancient plant may also provide a new “compass” for stem cell research, telling scientists how better to program stem cells for medical purposes. Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciences and Prof. Ralf Reski of the University of Freiburg have discovered a new use for the Polycomb group proteins (PcG) found in moss. They reported their findings recently in the journalDevelopment. PcG proteins play an important role in telling stem cells how to develop, they believe.

  36. Raine Aslan - 4th period on October 26th, 2009 6:18 pm

    1. Moss can provide a compass for stem cell research.
    2. It shares basic development processes with those found in humans.
    3. Moss has PcG proteins.
    4. These proteins play an important role in telling stem cells how to develop.
    5. Insights from this research have implications for plant and human development alike, and with time could be applied to cancer research.

  37. Owen Clarke 4th on October 26th, 2009 8:40 pm

    Moss always points north. This old, historic plant may be a new compass for stem cell research. Moss shares a basic developmental plan with humans. Very few plants do that. If cellular things are defective, then it can cause cancer. This leads to the breakdown of a healthy cell. Putting moss in people helps prevent this. Go moss! I have learned a lot from this article summary. Too much in fact! Just kidding, I can never stop learning because science is so great.

  38. Courtney Grays 6th period on October 29th, 2009 7:59 am

    1. moss shares basic development as humans

    2.moss shows the direction of north

    3.moss has been around for 450 million years

    4. scientist have found medical purposes in moss.

    5.moss is considered a lower class organism

  39. austin xayavong 5th on November 1st, 2009 8:22 pm

    1.Some people no that moss allways points north.
    2. Moss is like a compass in a way.

  40. Derrell Sledge 1st period on November 1st, 2009 8:54 pm

    1.Dr. Nir Ohad of Tel Aviv University Department. Ralf Reski of the University of Freiburg have foud out a new use for the Polycomb group proteins (PcG) found in moss.
    2.Moss is a plant that tells basic development processes with that is found in humans.
    3.This finding has important implications in stem cell therapies, which can go awry if implanted stem cells aren’t reprogrammed properly.
    4.In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms
    5.“As they develop, stem cells go from having a non-defined function to a specific one,” says Dr. Ohad.

  41. Robert mCClintock 2nd on November 2nd, 2009 6:10 pm

    1. Moss can piont north as a compass for hikers.
    2. PcG proteins play an important role in telling stem cells how to develop.
    3. It shares basic Development processes with human bodys.
    4. Moss has been around us for more than 450 million years.
    5.PcG protien in moss has a common function in plants and humans, describing the point at which a stem cell “decides” to become a leaf or flower

  42. Brett Stoddard 5th on November 7th, 2009 3:46 pm

    1).Moss on a tree trunk always pionts north.
    2).The ancient plants may also provide a new compass
    3).Research is funded by the German Israeli foundation.
    4).Moss shares basic development with humans.
    5).Research has direct implications for the study of plant biology.

  43. austin xayavong 5th on November 14th, 2009 9:39 pm

    1.Hikers know that moss on a tree trunk always points north.
    2.The research is being funded by the German-Israeli Foundation.

  44. Tara Harville- 1st per. on November 15th, 2009 6:21 pm

    1. Moss on a tree trunk always points north.
    2. It also provides a new “compass” for stem cell research, telling scientists how better to program stem cells for medical purposes.
    3. Dr. Nir Ohad discovered a new use for the Polycomb group proteins (PcG) found in moss.
    4. He reported their findings recently in the journal Development.
    5. Moss is a kind of plant that shares basic development processes with those found in humans.

  45. Andrew Crisp 1st on November 16th, 2009 8:06 am

    1.Moss is a plant that tells basic development processes with that is found in humans.
    2.Hikers know that moss on a tree trunk always points north.
    3.It shares basic Development processes with human bodys.
    4.According to new research by Israeli and German scientists, this ancient plant may also provide a new “compass” for stem cell research, telling scientists how better to program stem cells for medical purposes.
    5.PcG proteins play an important role in telling stem cells how to develop, they believe.

  46. Takara Alexander 5th pd :) on November 16th, 2009 1:32 pm

    hikers know where north is by the moss of the trees
    scientists discovered a new group for polycomb
    moss is a kind of plant that shares basic development
    the ancient plant provides a new compass
    the reasearch examined central function

  47. takara alexander 5th pd on November 16th, 2009 1:37 pm

    hikers know where north is by the moss of the trees
    scientist has discovered a new use for polycomb
    moss is a plant that shares basic development
    the reasearch examined a central function
    the ancient plant can provide a new compass

  48. Allison Dreisewerd - 4th period on November 16th, 2009 5:10 pm

    This article is on moss. Moss on a tree trunk always points north. Also moss is a kind of plant that shares basic development process with those found in humans. It has been around 450 million years. As they develop cells go from having a non-defined function to a specific one. PcG proteins play an important role in telling stem cells how to develop.

  49. Chase Massey-5th Period on November 16th, 2009 5:11 pm

    1. Moss has been around for about 450 million years.
    2. Moss on a tree trunk always means North.
    3. Scientists have discovered a new use for Polycomb group proteins (PcG) found in moss.
    4. Moss makes cells by non defined function.
    5. Moss growth is alit like humans.

  50. deondre surles6th period on November 16th, 2009 5:15 pm

    Hikers know that green moss points north.

    Ancient plants might be a new compass.

    Green moss has been around us for 450 million years.

    Moss is a compass if you know what way it points.

    Moss is considered a lower organism.

  51. Mauhaun Taheri 1rst period on November 16th, 2009 7:58 pm

    1.Moss is found in the north and is the way hikers know where they are.
    2.Moss also provide a new compass for people.
    3.Moss are lower class organsisms.
    4.The proteins PcG is found in moss.
    5. In 450 million years moss is still with us

  52. Brett Baird 6th on November 16th, 2009 8:16 pm

    The protien helps us understsand more about a cell. The paper is about an old DNA system that organizes the inside of a cell. This could help us learn more about cancer. Moss has been considered by some scientists as a lower class organism.

  53. shaquera wade 6th pd on November 17th, 2009 11:38 am

    hikers know where north is by the moss of the trees
    scientist has discovered a new use for polycomb
    moss is a plant that shares basic development
    the reasearch examined a central function
    the ancient plant can provide a new compass

  54. takara alexander 5th pd on November 17th, 2009 11:41 am

    hikers know where north is by the moss of the trees
    scientists has discovered a new use for PolyComb
    moss is a plant that shares basic development
    the reasearch examined a central development
    the ancient plant can provide a new compasss

  55. Rachel whorton 2nd on December 7th, 2009 9:00 pm

    1) Moss has been around for a long time
    2) Moss is a kind of plant that shares basic development process with those found in humans.
    3) Moss on a tree trunck always points to the north.
    4) As the stem cells develop they go from having a non-defined function to a specific function.
    5) The PcG proteins play an important role in telling the stem cells how to develop.

  56. Marilyn Larry 6th 8dec09 on December 8th, 2009 10:19 am

    Moss on a tree trunk always points north.
    PcG proteins play an important role in telling stem cells how to develop.
    An acient mechanism affect gene expression.
    In some instances in cancer where the cellular mechanisms are defective or impaired.
    This ancient plant can provide a new compass.

  57. Michael worshim -6th on December 8th, 2009 10:23 pm

    Moss on a tree point north.
    Ancient plant may provide new compass.
    Moss could be applied with cancer research.
    Moss in som cases are considered lower class organism.
    Moss is a highly adaptive organism.

  58. Elijah Hurskin 4th period 12/13/09 8:34 pm on December 13th, 2009 9:30 pm

    1)Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciencesdiscovered a new use for the Polycomb group proteins found in moss.
    2)Moss on a tree trunk always points north.
    3)Moss is a kind of plant that shares basic development processes with those found in humans.
    4)Polycomb group proteins play an important role in telling stem cells how to develope.
    5)In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms.

  59. amari anderson- ortiz p.1 on December 14th, 2009 5:38 pm

    1. this article is about improving stem cell techniques.

    2. moss is a kind of plant

    3. you can tell which way is north by looking at moss on a tree.

    4. stems go from having a non- defined function to a specific one.

    5. moss is considered to be in a lower class.

    YOU ROCK MISS DAVIS!!!! ^^

  60. christopher kirby on December 14th, 2009 5:52 pm

    1.moss on a tree means north.
    2.agents plants provide new compass.
    3.some moss produces small resoures.
    4.as moss grows so does the cell membrane.
    5.moss is a rare plant that grows on trees.

  61. Max Stephenson 2 on December 16th, 2009 11:24 am

    1. moss grows on the north side of a tree tronk

    2. scientists have discovered new ways to use the Polycomb group proteins.

    3. the reasearch is founded by German-Israeli Foundation.

    4. mosss is a type of plant that grows and develops like a person :) -<

    5. The ancient plant in the picture below can porvide a compass for stem cell research.
    :0

  62. Sarah Christopherson 5th on January 12th, 2010 7:32 pm

    1.The researchers examined the central regulatory function of the PcG complex and how it programs an organism’s development
    2. Moss could be applied with cancer research.
    3. . moss is a kind of plant
    4. Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciences discovered a new use for the Polycomb group
    5. The ancient plants may also provide a new compass

  63. MaRhea Wood - 2nd period on January 16th, 2010 5:02 pm

    1.) moss on a tree trunk always points north.
    2.) moss has been around for 450 million years.
    3.) scientists have discovered a new use for the pcg found in moss.
    4.) moss is a kind of plant that shares basic development proccesses with those found in humans.
    5.) an ancient plant called may, might provide a new compass for stem cell research.

  64. hunter webber 6th on January 18th, 2010 10:50 pm

    1. moss is a plant.
    2. moss on a tree is always north.
    3. humans have similar basic devilment as moss.
    4. moss has been dated back as far as 450 million years.
    5. PcG is found in moss.

  65. Reagan Locke 4th on January 24th, 2010 8:35 pm

    Moss always points north on a tree. The ancient plants may also provide a new compass. Moss are lower class organisms.The proteins PcG is found in moss. In 450 million years moss is still with us.

  66. Madeline Holifield 4th period science on February 21st, 2010 3:34 pm

    1.Hikers know that moss on a tree trunk always points north.
    2.Moss is a kind of plant that shares basic development processes with those found in humans.
    3.The researchers suggest that the basic function of the PcG mechanism in moss, common to its function in plants and humans, is in regulating cell differentiation, describing the point at which a stem cell “decides” to become a leaf or flower, for example.
    4.In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms. But Dr. Ohad defends mosses as highly adaptive organisms, which after 450 million years are still with us.
    5.It gives science a tool to control tissue specification, timing of reproduction and the development of traits in seeds that serve as the source for human and animal feed.

  67. max Stephenson 2nd on February 22nd, 2010 10:15 pm

    (1)Moss always points north on a tree.

    (2)Moss shares basic development with humans.

    (3)In some scientific disciplines moss is considered as low class.

    (4)Scientist have discovered a new use for the Polycomb group proteins (PcG) found in mossScientist.

    (5)Moss have been around 450 million years.
    :P

  68. Maysie Spears- 4th period on March 4th, 2010 10:09 pm

    1.) All hunters know that moss on a tree trunk always points North.
    2.) Moss is a kind of plant that shares basic development processes with those found in humans.
    3.) Moss is a type of plant that grows and develops like a human being.
    4.) According to researh by Israeli and German scientists, moss may also provide a new “compass” for stem cell research.
    5.) Dr. Nir Ohad discovered a new use for the Polycomb group proteins (PcG) found in moss.

  69. Sam Neighbors on March 8th, 2010 2:24 pm

    1)Moss is a plant.

    2)Moss faces north on a tree.

    3)Humans have similar basic devilment as moss.

    4)Moss have been around 450 million years.

    5)This article is about improving stem cell techniques.

  70. alex 4th period on March 29th, 2010 7:35 pm

    1 Moss always grows on the north side of a tree.
    2 Moss is a type of plant that grows and develops like a human being.
    3 Dr. Nir Ohad discovered a new use for the Polycomb group proteins, (PcG) found in some moss.
    4 Moss is a kind of plant that shares development processes with those found in human beings.
    5 Moss has been dated back as far as 450 million years.

  71. Max Stephenson 2nd on April 22nd, 2010 8:24 pm

    1.Hikers know that moss on a tree trunk always points north.
    2.Ralph Reski learned there is protein in moss.
    3.the reseachers found a way that alters the dna organizes inside the cell nucleus which effects gene expression.
    4.Stem cells go from having a non-defined functionn to a specific one.
    5. Moss is a kind of plant that shares basic development processes with those found in humans.

  72. max Stephenson 2nd on April 22nd, 2010 8:26 pm

    1Moss is found in the north and is the way hikers know where they are.
    Dr. Nir Ohad of Tel Aviv University’s Department of Plant Sciences and Prof. Ralf Reski of the University of Freiburg have found a new use for the Polycomb
    group proteins that are in moss.
    2This finding has important implications in stem cell therapies, which can go 3awry if implanted stem cells aren’t reprogrammed properly.
    4These proteins play an important role in telling stem cells how to develop.
    5In some scientific disciplines, mosses are considered “lower-class,” or less advanced, organisms.

  73. Jenna Marshall 1st period on April 24th, 2010 2:28 pm

    ~Moss is found in the north and is the way hikers know where they are.

    ~Moss also provide a new compass for people.

    ~Moss are lower class organsisms.

    ~The proteins PcG is found in moss.

    ~In 450 million years moss is still with us.

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