Dictionary » C » Cistron

Cistron

Cistron

(Science: molecular biology) a genetic element defined by means of the cis trans complementation test for functional allelism, broadly equivalent to the sequence of dna that codes for one polypeptide Chain, including adjacent control regions. (genetics) a segment of dna that is involved in producing a polypeptide chain; it can include regions preceding and following the coding dna as well as introns between the exons; it is considered a unit of heredity; genes were formerly called factors.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


single-locus vs multi-locus models?

... models" and "multi-locus models"? My guess is that in the "single-locus model" the gene is defined as a single cistron, while in the "multi-locus model" a gene is considered as any stretch of DNA on the chromosome. But I could be completely mistaken. ...

See entire post
by SelfishGene
Fri Nov 19, 2010 5:51 am
 
Forum: Genetics
Topic: single-locus vs multi-locus models?
Replies: 1
Views: 6434

1 gene = 1 polypeptide

That is the reason why the cistron notion has been introduced. Another reason for reevaluating this theorem is the fact that a gene can code for a RNA that is not translated(e.g. rRNA, tRNA, snRNA, snoRNA etc)

See entire post
by MrMistery
Wed Aug 23, 2006 6:04 pm
 
Forum: Genetics
Topic: 1 gene = 1 polypeptide
Replies: 3
Views: 6203

Gene, Enzyme

Doesn't one cistron code for a particular polipeptide chain? If so, more cistrons can code for one enzyme, cause some enzymes and other proteins have more than one polipeptide chain(cuarternary structure)

See entire post
by MrMistery
Thu Mar 16, 2006 8:07 pm
 
Forum: Genetics
Topic: Gene, Enzyme
Replies: 4
Views: 2481

Gene, Enzyme

Hey the "one gene one enzyme concept" proposed by Beedle & Tatum has been discarded. The new concept is "one cistron one enzyme" This means one cistron (the functional part of gene) codes for one enzyme. I think this will help you better

See entire post
by asutoshsahu
Thu Mar 16, 2006 6:39 am
 
Forum: Genetics
Topic: Gene, Enzyme
Replies: 4
Views: 2481


This page was last modified 21:16, 3 October 2005. This page has been accessed 7,501 times. 
What links here | Related changes | Permanent link