Fig. 2.
Protein expression of angiotensin-converting enzyme (ACE) (3 blots) (A) and ACE activity (n = 6 in each group) (B) in cardiac tissue of young and aged rats and aged rats with exercise training (Aged-Ex) are shown. C: ACE activity in the 3 groups, represented as changes in relative fluorescence units (RFU) over time (minute) in the presence (+) and absence (−) of captopril (10−5 M), a specific inhibitor of ACE (n = 6 in each group). *Significant difference from young group. #Significant difference from aged group.