The proteins of Hevea brasiliensis latex. 2. Isolation of the α-globulin of fresh latex serum

Abstract
One of the 2 major protein components of fresh Hevea-latex serum was isolated by an isoelectric precipitation method and the optimum conditions for the precipitation determined. Attempts to isolate this component by fractional precipitation of the total serum proteins with ammonium sulfate gave markedly heterogeneous products. A preliminary examination was made of the purified protein. Analytical and solubility data indicate that it is a globulin lacking non-protein prosthetic groups.

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