Examlex
In The Scarlet Empress (1934) , director Josef von Sternberg photographs Marlene Dietrich to accentuate her
Tryptophan Operon
A cluster of genes in bacteria that is involved in the production of tryptophan, regulated through feedback inhibition.
Repressor
A protein that binds to specific DNA sequences, preventing or reducing the transcription of certain genes.
Allosteric Site
A region on an enzyme that is distinct from the active site and can bind regulatory molecules to change the enzyme's activity.
cAMP
Cyclic adenosine monophosphate, a second messenger important in many biological processes.
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