catabolite (gene) activator protein

ca·tab·o·lite (gene) ac·ti·va·tor pro·tein (CAP),

a protein that can be activated by cAMP, whereupon it affects the action of RNA polymerase by binding it with it or near it on the DNA to be transcribed.

ca·tab·o·lite (gene) ac·ti·va·tor pro·tein

(CAP) (kă-tab'ō-līt jēn ak'ti-vā-tŏr prō'tēn)
A protein that can be activated by cAMP, whereon it affects the action of RNA polymerase by binding with it or near it on the DNA to be transcribed.
Synonym(s): cAMP receptor protein.