Fig. 6.

Protein expression of Ca²⁺ handling proteins. A: example Western blots of sarco/endoplasmic reticulum Ca²⁺ ATPase (SERCA; 100 kDa), phospholamban (PLB; 6 kDa), the Ser16 phosphorylation site of PLB (SER16-PLB; 6 kDa), the Thr17 phosphorylation site of PLB (THR17-PLB; 6 kDa), the Na⁺-K⁺-ATPase (NA/K; 100 kDa), sodium-calcium exchanger (NCX; 120 kDa), ryanodine receptor (RYR; 565 kDa), and calsequestrin (CSQ; 50 kDa). Summary data of protein expression (relative to CSQ) of SERCA (B), PLB (C), SERCA/PLB ratio (D), SER16-PLB (E), THR17-PLB (F), Na⁺-K⁺ ATPase (G), NCX (H), and RYR (I). Data shown are from whole heart homogenates of CON, AB, and AB-LIT groups; n = 5–7 animals per group. *P < 0.05 vs. CON. #P < 0.05 vs. AB. §P < 0.10 vs. CON and AB.