Ⅲl基因的转录
III、基因的转录
基因转录:DNA—mRNA Template strand Coding strand ATGCGCCATGCCAGTTACGTACATGGA TACGCGGTACGGTCAATGCATCTACCT RNA sequence is TRANSCRIPTION complementary to template strand identical to coding strand UACGCGGUACGGUCAAUGCAUCUACCU RNA transcript The function of polymerase is to copy one strand of duplex dNa into RNA
基因转录：DNA mRNA The function of polymerase is to copy one strand of duplex DNA into RNA
NAANAA 10+1+10+20+30+40 Startpoint Promoter proximal distal Terminator Downstream a transcription unit is a sequence of DNa transcribed into a single rna starting at the promoter and ending at the terminator
A transcription unit is a sequence of DNA transcribed into a single RNA ， starting at the promoter and ending at the terminator
Transcription bubble in RNA polymerase Otebuhe progresses, the Polymerase moves DNA duplex reforms behind it, displacing the RNA in the form of a single polynucleotide chain 入AO RNA chain grows longer
As the bubble progresses,the DNA duplex reforms behind it,displacing the RNA in the form of a single polynucleotide chain
During transcription, the bubble is maintained within bacterial RNa polymerase, which unwinds and rewinds DNA, maintains the conditions of the partner and template RNA Strands, and synthesizes rna Enzyme movement DNA coding strand Rewinding point Unwinding p DNA template strand Catalytic site RNA binding site
During transcription,the bubble is maintained within bacterial RNA polymerase,which unwinds and rewinds DNA,maintains the conditions of the partner and template RNA strands,and synthesizes RNA