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  • Title: Isolation and characterization of nerve growth factor from the venom of Naja naja atra.
    Author: Furukawa S, Hayashi K.
    Journal: J Biochem; 1976 Nov; 80(5):1001-9. PubMed ID: 1002678.
    Abstract:
    Nerve growth factor was isolated from the venom of Naja naja atra by ion exchange and gel permeation chromatography and was found to be homogeneous by disc gel electrophoresis. The molecular weight was estimated to be approximately 20,000 by gel filtration and 22,000 by ultracentrifugation. This protein, which showed an isoelectric point of pH 7.02, probably consists of two subunits of equal molecular weight which are held together or interact with each other noncovalently. The biological activity survives treatment by a number of proteolytic enzymes, such as trypsin [EC 3.4.21.4], chymotrypsin [EC 3.4.21.1], and pepsin [EC 3.4.23.1].
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