Abstract

The molecular weight of structural protein isolated from beef heart or beef liver mitochondria was determined. Samples of these proteins were purified to the point of electrophoretic homogeneity. The proteins were depolymerized by several different procedures. The molecular weight was determined by the methods of synthetic boundary sedimentation velocity, analytical zone sedimentation velocity and sedimentation equilibrium. The values for the molecular weight of structural protein clustered in the range of 55,000–70,000.

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