Sutherland found evidence for the presence of a g protein- coupled receptor for epinephrine in muscle cells. for this receptor to function normally, it must have at least how many binding sites, and what must be bound?

Three binding site

- guanine nucleotide

- guanosine triphosphate

- guanosine diphosphate

Explanation:

These sites are essential in signal transfer, cell growth, cytoskeletal assembly, protein synthesis and membrane vesicles transport.

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