Negative repressible operon

Operator

No product U present

Regulator gene

RNA polymerase

Operon

Structural genes

Gene g Gene h Gene i

Regulator gene

RNA polymerase

Structural genes

Gene g Gene h Gene i

Inactive regulator protein (repressor)

Biochemical pathway

Precursor T

Intermediate products

Product U (corepressor)

Inactive regulator protein (repressor)

Product U present

Inactive regulator protein (repressor)

Active regulator protein ♦.

Biochemical pathway

Precursor T

Intermediate products

Product U (corepressor)

0 0

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