CKM and dilated cardiomyopathy: In order to test this hypothesis, we compared the protein and mRNA expression of CKM, CKMit, and the alpha and beta subunits of the catalytic F1 domain of ATP synthase complex (ATPα and ATPβ, respectively) in myocardial samples from CCC, with that of dilated cardiomyopathies of other etiologies, and healthy hearts from organ donors.