Fig. 7.

Effect of Na/K-ATPase peptides on Src by in vitro kinase assay. A: amino acid sequence of α1 NaKtide and α3 NaKtide among different species. The amino acids of α3 NaKtide that are different from those of α1 NaKtide are in bold and underlined. B: Src (4.5 units) was incubated with different concentrations of NaKtide and α3 NaKtide for 15 min and then assayed for pY418 Src. Quantitative data from at least three independent experiments are shown as means ± SE. *P < 0.05 compared with control.