Which protein complex forms the coat of vesicles involved in receptor-mediated endocytosis of LDL?
Answer and explanation
Correct answer: C. Clathrin triskelions together with AP-2 adaptor protein complexes
LDL receptor-mediated endocytosis relies on clathrin and AP-2 adaptors to assemble coated pits. COPI mediates retrograde Golgi-to-ER transport, COPII mediates anterograde ER-to-Golgi budding, and caveolin forms static caveolae rather than classic coated vesicles.
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