In retinal rod cells of the eye, the protein transducin:
A) catalyzes the covalent attachment of 11-cis retinal to the protein opsin.
B) contains three subunits, one of which serves to activate a phosphodiesterase.
C) inactivates photoexcited rhodopsin to prevent cyclic GMP hydrolysis.
D) Both A and B are correct.
E) Both B and C are correct.
Correct Answer:
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