Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum

Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum (http://www.molecularstation.com/forum/)
-   DNA Forum (http://www.molecularstation.com/forum/dna-forum/)
-   -   GC content partly predicted 2 or more RNA polymerases in eukaryotes?? (http://www.molecularstation.com/forum/dna-forum/85474-gc-content-partly-predicted-2-more-rna-polymerases-eukaryotes.html)

exutu 05-21-2012 06:34 PM

GC content partly predicted 2 or more RNA polymerases in eukaryotes??
 
Hello.
I'm reading in my molecular biology book by Robert Weaver, reading about the eukaryot RNA polymerase. This is a book which uses a fair amount of its time on the experiments which lead to the knowledge presented. It starts out with 3 reasons for why there probably should be at least 2 RNA polymerase:
(and we all know that there is 3 nuclear RNA polymerases, at least that is what I'm told ;))
"...(1) They have a different base composition from that of other nuclear genes. For example, rat rRNA genes have a GC content of 60%, but the rest of the DNA has a GC content of 40 %"
the two others are that the rRNA genes is unusually repetitive and that they are in different compartments (nucleolus and nucleoplasm).
I'm not sure I understand why the different GC content lead to believe that there are more than one RNA polymerase. Is it because the different polymerases are optimized for different GC content (although I don't know how that mechanism would work, I would love to know it) or something completely different?
Hope you can help me :)

candywhy 05-22-2012 07:59 AM

Re: GC content partly predicted 2 or more RNA polymerases in eukaryotes??
 
Hope u can find what u want...
wish all the best to ur new book


All times are GMT. The time now is 12:46 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved

Page generated in 0.09228 seconds with 11 queries