Fig. 5. Comparison of the level expression of proteins involved in regulation of excitation-contraction coupling in the heart. ( A ) Representative gel with myosin control. Position of molecular weight standards are shown on the left. ( B ) Summary of data comparing normal and hypertrophied hearts normalized to the level of actin expression (n = 8). MHC = myosin heavy chain, cTnT = troponin T, Tm = tropomyosin, cTnI = troponin I, MLC = myosin light chain, cTnC = troponin C.