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| Description: Table 12.7 Mechanisms of Transcription Regulation in Bacteria Mechanism Actions and Outcomes Operon-specific control lnducer substances, such as lactose, and negative feedback mechanisms, such as tryptophan availability, regulate gene transcription in coordinately controlled operons. CAP—CAMP control CAP-CAMP is utilized as a positive regulator of transcription for genes in several different operons, including the lac operon. Alternative sigma factors Extreme growth conditions, such as heat stress and starvation, induce transcription of alternative sigma factors.
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