Biology 2581B Lecture Notes - Lecture 25: Cytochrome C Oxidase Subunit I, Noncoding Dna, Rna Editing

49 views4 pages

Document Summary

Cox1: intact&continuous, part of polycistronic transcript, encodes a protein. Lsu & ssu rrna: intact & tandem repeats (head to tail, 300-400 repeats of 5 diff chromosomes. Cox 1 gene fragmented over 9 chromosomes & united @ the rna level to make full transcript. Exhibits rna editing in both cox1 & lsu rrna. World record holder for the highest number of u"s inserted at one site. Frameshift mutations @ aggy (+1) & cccca (+2) motifs @ dna level. Ribosomal slippage ribosomes slip over the frameshift = normal cox 1 gene. Cox1 gene has non-coding sequences (not introns) that persist in mrna. Translational bypass the non-coding shit makes a loop and ribosome jumps over it = normal cox 1. Endosymbiotic gene transfer moved cox1-b into nucleus. In mito, proteins come together to make cox 1. Gene a contains intron which contains gene b. Uses standard genetic code unusual for mitochondria mitochondria do not always use alternative genetic codes.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents