GENE REGULATION = REGULATION OF TRANSCRIPTION

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Presentation transcript:

GENE REGULATION = REGULATION OF TRANSCRIPTION

THE LACTOSE OPERON

THE LACTOSE OPERON OPERON = CONTIGUOUS GENES WITH ONE PROMOTER POLYCISTONIC mRNA INDIVIDUAL RIBOSOME BINDING SITES FOR EACH mRNA MESSAGE OPERATOR = DNA SITE WHERE REPRESSOR PROTEIN BINDS ALLOSTERIC CHANGE IN SHAPE

DEREPRESSION OF THE LAC OPERON BY LACTOSE

CYCLIC AMP A SECOND MESSENGER ADENYL CYCLASE PHOSPHODIESTERASE

RNA POLYMERASE 1 and III C-TERMINAL DOMAIN RNA POLYMERASE II www.steve.gb.com/science/transcription.html RNA POLYMERASE 1 and III C-TERMINAL DOMAIN RNA POLYMERASE II

INITIATION OF TRANSCRIPTION IN EUKARYOTES

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