Expression levels of intracellular calcium efflux mediators from control (C), diabetes (D), myocardial infarction (I), and diabetes + myocardial infarction (DI) rats (n = 8 for each group). Targeted bands were normalized to cardiac GAPDH. A) Representative blots of Phospholamban (PLN), Phosho-Ser16-PLN, Phosho-Thr17-PLN, PP1, and GAPDH; B) PLN; C) SERCA2/PLN ratio; D) Phosho-Ser16-PLN normalized to total PLN; E) Phosho-Thr17-PLN normalized to total PLN; and F) PP1. * p < 0.05 vs. C; † p < 0.05 vs. D; ‡ p < 0.05 vs. I.