Post reply

Reply to the message by David Turell

Name:

E-mail: (optional, won't be displayed directly)

Leave this field empty:

Homepage: (optional)

Leave this field empty:

Location: (optional)

Remember me (cookie)

Category:

Subject:

Formatting help

skip to input

format text bold: [b]bold text[/b]
format text italic: [i]italic text[/i]
insert hyperlink: [link=http://example.com/]link text[/link] / [link]http://example.com/[/link]
set text color: [color=#rgb]colored text[/color]
font size: [size=small]small text[/size]; [size=large]large text[/size]
insert list: [list][*]list item[/list]
insert image: [img]http://example.com/image.jpg[/img]; left: [img=left]http://example.com/image.jpg[/img]; right: [img=right]http://example.com/image.jpg[/img]; thumbnail: [img=thumbnail]http://example.com/image.jpg[/img]; thumbnail left: [img=thumbnail-left]http://example.com/image.jpg[/img]; thumbnail right: [img=thumbnail-right]http://example.com/image.jpg[/img]

:-)
;-)
:-P
:-D
:-|
:-(

Message:

> How epigenetic modifications are passed to next generations is now being found:-"After DNA replication and division, cells generally remember which of their genes should be active and which repressed&#151;but how? A study in worms published today (September 18) in Science reveals that part of the mechanism involves divvying up modified histones&#151;molecular tags that label active or repressed genes&#151;between daughter chromosomes at replication. Researchers from the University of California, Santa Cruz and Indiana University, Bloomington, found that although the tags in each chromosome are reduced as a result of division, subsequent recruitment of histone-modifying enzymes reestablishes the full tag quota, thus preserving the memory of modifications for the next round of division.   &#147;They show very elegantly using their system that modified histones can be inherited through multiple rounds of cell division and can be passed on . . . to the next generation,&#148; said Shiv Grewal, an epigenetics and chromatin researcher at the National Cancer Institute who was not involved in the work. &#147;That&apos;s quite remarkable.&#148;"- http://www.the-scientist.com//?articles.view/articleNo/41050/title/Heritable-Histones/-Histones are the molecules around which DNA is wrapped.