Pathology Why is Troponin C not used for MI diagnosis? A Ttroponin C binds to calcium B Troponin C is present in both cardiac and smooth muscle C Troponin C is present in both cardiac and skeletal muscle D It elevates late after onset of MI. 💡 Explanation Why is Troponin C not used for MI diagnosis? ✓ Correct Answer: B. Troponin C is present in both cardiac and smooth muscle