Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Inhibition of the cGMP-hydrolytic activity in cytosolic fractions of failing human left ventricular myocardium by sildenafil. cGMP-hydrolytic activity was measured at 0.1 μM cGMP in the presence of 200 μM Ca2+ and 50 nM calmodulin or in the presence of 100 μM EGTA. Each value represents the average ± S.D. of at least three determinations.
