Which Protein of the Thin Filament is Responsible for Calcium

Question

Which protein of the thin filament is responsible for calcium binding?
A)tropomyosin
B)troponin C
C)troponin T
D)calmodulin
E)actin

Accepted Answer

Troponin C is the protein responsible for calcium binding in the thin filament. It binds calcium ions and undergoes a conformational change, causing tropomyosin to move and expose the myosin binding sites on actin, leading to muscle contraction.