Inducible System

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Regulation of Protein Synthesis - Operon Structural Genes Operator Genes Promoter Gene Regulator Gene Control Mechanism - Induction Control Mechanism - Repression Inducible System Repressible System Negative Control of Protein Synthesis Positive Control of Protein Synthesis Mutation in the Operon

Inducible System

	Inducible System - Inducer absent: Regulator gene --> Active repressor. --> Binds to and blocks operator gene. --> No mRNA transcription by structural genes. --> No enzyme synthesis
Inducer Present : Regulator gene --> Active repressor --> + inducer --> Inactive repressor. --> No blocking of operator gene. --> mRNA transcription by structural genes. --> Enzyme synthesis.

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Regulation of Gene Activity in Eukaryotes Frenster's Model of Gene Regulation Nonhistone Protein as Derepressors Britten Davidson Operon Operator Model Sensor Genes Producer Genes Integrator Genes Receptor Genes