Control of Protein Synthesis

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Chapter 18.4

• Control of Protein Synthesis
• Lac and Tryp operons

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Figure 18.20 Regulation of a metabolic pathway
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The trp operon regulated synthesis of
repressible enzymes
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trp operon
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The lac operon regulated synthesis of inducible
enzymes
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lac operon
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 Positive control of the lac operon by catabolite
activator protein (CAP)
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lac operon cap protein
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The Operon Movies

• http//vcell.ndsu.nodak.edu/animations/lacOperon/i
  ndex.htm
• http//highered.mcgraw-hill.com/olcweb/cgi/pluginp
  op.cgi?itswf535535/sites/dl/free/0072437316
  /120080/bio26.swfThe20Tryptophan20Repressor