What GTP-binding protein is associated with the formation of the COPI coat on COPI-coated vesicles?
A)Sar1
B)Arf Arf
C)ARF1 (adenosylation ribose factor)
D)Ras
E)Src

Question

Quizplus · Accepted Answer

ARF1 is the GTP-binding protein associated with the formation of the COPI coat on COPI-coated vesicles. Sar1 is associated with the formation of COPII coats on COPII-coated vesicles, while Arf is a general term used to describe several ARF proteins with various functions. Ras and Src are not directly associated with the formation of COPI coats.

What GTP-Binding Protein Is Associated with the Formation of the COPI