For many years, _______ was the only member of the GPCR superfamily to have its X-ray crystal structure determined.
A)rhodopsin
B)the steroid receptor
C)the insulin receptor
D)the glucagon receptor
E)the endocrine receptor

Question

Quizplus · Accepted Answer

Rhodopsin was the first G protein-coupled receptor (GPCR) to have its X-ray crystal structure determined, back in 2000. While structures of other GPCRs have since been determined, for many years, rhodopsin was the only member of the GPCR superfamily with a crystal structure.

For Many Years, _______ Was the Only Member of the GPCR