MICB 325 Study Guide - Quiz Guide: Stem-Loop, Mhc Class I Polypeptide-Related Sequence B, Gene Expression
Document Summary
Protein is called a repressor: positive regulation = binding of a regulatory protein near a promoter increases gene transcription. The dna sequence where a regulatory protein binds is often called an operator. Activators bind 5" of or within a promoter, repressors bind on either side of or within a promoter. Distances vary, and dna looping may result from interaction between proteins bound to two operators. Microbiol 2:1 in optional reading folder on web site. : therefore, mutation of a gene that encodes a regulatory protein alters the expression of other genes. Operons, mrna degradation, mrna translation, polar mutations, and gene expression. 5" coding region a: the stability of a mrna segment depends on the secondary structure of the mrna, which. Large amount protein a rapidly degraded segment results from base-pairing within the molecule to fold regions of the linear mrna into double-stranded "hairpins" and similar structures.
