MYLK3 and familial dilated cardiomyopathy: Interestingly, the same Mylk3 variant (g.chr8:85365179A>T; c.-5T>A) was previously described and, although that study found no evidence of DCM at an early time point (16 wk), it did show the B6N heart papillary muscles contracted with less force than those from B6J hearts (44).