Effects of insulin or phlorizin on the protein levels of cardiac K
channels in STZ-treated rats with 8 weeks of diabetes. Upper panel depicts the Western blot analysis of representative protein levels for SUR-2A or Kir6.2, actin in hearts isolated from these diabetic rats treated in same manner. Quantification of protein levels using SUR-2A or Kir6.2/actin, expressed as mean with SE (n = 6 per group) in each column, is indicated in the lower panel. * P < 0.05, ** P < 0.01 and *** P < 0.001 vs. control.