PKNOX2 and familial dilated cardiomyopathy: To validate the rise–fall expression pattern of PKNOX2 during myocardial remodelling, we examined the protein expression in left ventricle myocardium from donor hearts, left ventricle myocardium from DCM hearts (DCM LV, end-stage fibrosis), and right ventricle myocardium from DCM hearts (DCM RV, intermediate state of fibroblast activation).