TNNT2 and familial dilated cardiomyopathy: A deletion mutation of Lysine 210 (ΔΚ210) in the cardiac troponin T gene (TNNT2) was identified in familial DCM cases37, and mouse model harboring a knock-in of ΔΚ210 developed cardiac enlargement and heart failure, recapitulating the phenotypes of DCM patients38.