Amino acid sequences of several fragments of the 25 k protein (molecular mass 24,953 Da) previously isolated from cobra Naja kaouthia (Kukhtina et al. Bioorg. Khim., 2000, vol. 26, pp. 803-807) were determined. Their comparison with the primary structures of known proteins showed that the 25 k protein belongs to the CRISP family and is the first protein of this type identified in cobra venoms.
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