Reduced level of serine16 phosphorylated phospholamban in the failing rat myocardium: a major contributor to reduced SERCA2 activity

The observed changes in SERCA2 activity after increasing and decreasing serine(16) PLB phosphorylation in cardiomyocytes from sham and failing hearts, suggest that the observed reduction in serine(16) PLB phosphorylation is one major factor determining the reduced SERCA2 activity in heart failure after MI.