BIOC 2580 Study Guide - Final Guide: Tums, Allolactose, Dna Binding Site
Document Summary
Mostly operons which are polycistronic transcripts with two or more genes with related functions transcribed as one rna molecule. Only one mrna has to be regulated for multiple genes which is an advantage. Regulatory gene is on a separate mrna, but is very close to the operon to control the transcription. Proteins from the regulatory gene works with operators to control the transcription. Operators are adjacent to the genes in the operon. Physical placement of a protein onto or next to the promoter region inhibits rnap ability to find the promoter: Operon expression is determined by access of rnap to promoter, and regulatory proteins on the operator. Linear array with transcriptional control regions at the start (operator and promoter) followed by a set of related genes. Operators can be before or after the promoter. Operators are usually very close to the promoter sequence, but they do not have to be.