Which of the following is NOT a characteristic exhibited by troponin C (TnC)?
A)TnC has 2 binding sites that are always complexed to Ca²⁺.
B)A conformational change in TnC occurs on Ca²⁺ binding.
C)Ca²⁺ binding to TnC decreases interaction between TnI and actin.
D)TnC has 4 equivalent Ca²⁺ binding sites

Question

Quizplus · Accepted Answer

Troponin C has four Ca²⁺ binding sites, but they are not all equivalent; two are high-affinity sites that are always occupied by Ca²⁺ or Mg²⁺, and two are low-affinity sites that bind Ca²⁺ during muscle contraction.

Which of the Following Is NOT a Characteristic Exhibited by Troponin