alexa Purification and partial characterization of two basic proteins from human peripheral nerve.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Proteomics & Bioinformatics

Author(s): Abramsky O, London Y

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Abstract Two basic proteins, denoted P1 and P2 protein, were purified from human sciatic nerve. The isolation was achieved by the following steps: delipidation with chloroform/methanol mixtures, dry acetone and dry ether; acid extraction at pH 2; ion exchange chromatography on QAE-Sephadex A-25 and gel filtration on Sephadex G-100. P1, P2 proteins and the basic protein of the central nervous system have been shown to have different electrophoretic mobility, and each of the two peripheral basic proteins was shown to be homogeneous by disc electrophoresis. The molecular weight of P1 protein is around 14 100 and that of P2 protein is around 12 200, as determined by ultracentrifugal analysis. There was some difference in the amino acid composition of human P1 and P2 protein, and a marked difference between their composition and the composition of central basic protein and bovine peripheral P1 and P2 proteins which were described previously. When injected to animals, P1 protein induced only experimental allergic neuritis while P2 protein induced both mild experimental allergic neuritis and experimental allergic encephalomyelitis. Thus, the human P1 protein is similar to the bovine P1 protein and human P2 protein is similar to bovine P2 protein, concerning their electrophoretic mobilities, molecular weights and biological properties.
This article was published in Biochim Biophys Acta and referenced in Journal of Proteomics & Bioinformatics

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