The Subunits of the Heterotrimeric G Protein Are Called ___________ $\alpha$

Multiple Choice

The subunits of the heterotrimeric G protein are called ___________ subunits.

A) $\alpha$ , $\beta$ and $\chi$
B) $\alpha$ , $\beta$ and $\delta$
C) $\alpha$ , $\beta$ and $\gamma$
D) $\alpha$ , $\gamma$ and $\delta$
E) $\gamma$ , $\delta$ and $\eta$