Cardiac muscle proteins of four inbred murine strains were analyzed by one- and two-dimensional electrophoresis. Of those, 27 and 161 protein fractions were characterized in terms of molecular mass and relative electrophoretic mobility. The protein fractions were identified as corresponding to creatine phosphokinase, myoglobin and an albumin-like protein. Six polypeptides characterized by interlinear polymorphism were identified.
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