TNC and familial dilated cardiomyopathy: Therefore, relative maximal actomyosin ATPase rates of DCM (Figure 1B) and HCM (Figure 1C) mutant Tm samples in high and low [Ca2+] at 1 μM Tm and 1–1.5 μM Tn, were plotted to better illustrate the [Ca2+]-dependent trends.