MBG 2040 Lecture 6: MBG 2040 Ch. 17
3 Dec 2017
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Document Summary
Genetic regulation in prokaryotes: regulation of gene expression in prokaryotes, the lac operon of e. coli. Regulation of gene expression in prokaryotes- an overview: However , t he r egulat or y mechanisms wit h t he lar gest ef f ect s on phenot ype act at t he level of t ranscript ion. Ribosomal rnas and proteins involved in protein synthesis- expressed constitutively: other genes often expressed only when their products are required for growth. Inducible and repressible gene expression: other gene products are needed for cell growth only under certain environmental conditions (regulated genes: inducible or repressible, regulatory mechanisms allow the synthesis of these gene products only when they are needed. This pr ocess of t ur ning on t he expr ession of genes in r esponse t o a subst ance in t he envir onment is called induct ion.
