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Three cytotoxin-like proteins from the venom of Ophiophagus hannah were isolated by a combination of ion exchange chromatography and reverse phase HPLC. Amino acid sequence analysis revealed that these proteins all consisted of 63 amino acids and shared approximate 50% and 56% sequence identity with Naja naja atra cardiotoxins and cardiotoxin-like basic proteins (CLBPs), respectively. CD spectra revealed...
Eight naturally purified microcystins (MCs), including MC-LR, -FR, -WR, -RR, [d-Asp 3 ]MC-FR, -WR, -RR, and [Dha 7 ]MC-RR were utilized to determine the effects of amino acid substitutions and modifications on MC-induced protein phosphatase inhibition activity and mouse toxicity. Catalytic subunits of protein phosphatase 1 (PP-1) and 2A (PP-2A) were purified and subjected to the inhibition...
Four novel cardiotoxins were isolated from Naja naja atra (Taiwan cobra) venom by successive separation on a SP-Sephadex C-25 column and a reverse phase column. Amino acid sequences of the cardiotoxins were determined by Edman degradation and carboxypeptidase digestion. It shows that these cardiotoxins comprise 60 amino acid residues. Comparative analyses on the amino acid sequences of cardiotoxins...
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