Effects of inhibitors of PKA, ϵPKC and PLC on forskolin-induced Na+-K+ pump inhibition. Myocytes were perfused with pipette solutions containing H89, ϵPKC inhibitory peptide, or U-73122 as indicated. The data from myocytes not exposed to inhibitors, previously presented in Fig. 1, is included for reference. The numbers of myocytes in each group are indicated in parentheses. The asterisk indicates a significant difference compared with control. pF, picofarads.