the substances that bind to repressors to prevent them from binding to their operators
What does a repressor look like?
The homocysteine repressor MetJ is an illustration of a repressor protein. MetJ utilizes the ribbon-helix-helix (RHH) motif to bind with DNA bases. MetJ is a homodimer made of two monomers, each of which contributes an alpha helix and a beta ribbon.
What triggers the repressor to work?
An amino acid binds with the met repressor and activates it when it is present. The repressor's presence on the DNA strand prevents RNA production. The repressor separates from the operator when the amino acid is absent, and RNA production continues
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