the activities of some membrane-bound enzymes such as adenylate cyclase , na+ + k+-stimulated adenosine triphosphatase ( na+ + k+-atpase ) , ca2+-stimulated atpase and mg2+-stimulated atpase were examined in heart sarcolemmal fractions from control and cardiomyopathic hamsters at different stages of heart failure .
C0018787
heart
C0878544
cardiomyopathic