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Sequential purification of cytotoxins from Naja kaouthia and Naja sumatrana venoms via high-performance liquid chromatography (HPLC). Fractionation of N. kaouthia (A) and N. sumatrana (B) venoms with Resource S cation-exchange chromatography. Purification of cytotoxin-containing fraction 9 of N. kaouthia (C) and N. sumatrana (D) venoms with reverse-phase chromatography. Pointers depict major cytotoxins purified from the cobra venoms.
