Comparative Study
doi: 10.1515/bchm2.1983.364.2.1717.
Snake Venoms. Purification, some properties of two phospholipases A2 (CM-I and CM-II) and the amino-acid sequence of CM-II and Bitis nasicornis (horned adder) venom
- PMID: 6667925
- DOI: 10.1515/bchm2.1983.364.2.1717
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Comparative Study
Snake Venoms. Purification, some properties of two phospholipases A2 (CM-I and CM-II) and the amino-acid sequence of CM-II and Bitis nasicornis (horned adder) venom
Hoppe Seylers Z Physiol Chem.
1983 Dec.
Abstract
Two phospholipases A2, CM-I and CM-II, were purified from Bitis nasicornis venom by gel filtration on Sephadex G-50, followed by ion-exchange chromatography on CM-cellulose. Both enzymes comprise 119 amino acids, including 12 half-cystine residues. The primary structure of CM-II has been elucidated. The sequence and invariant amino-acid residues of CM-II resemble those of phospholipases A2 from other venoms of Viperidae and Crotalidae (Group II) snake venoms. CM-I and CM-II both contain a single histidine residue which is probably located at the active centre (histidine-47). CM-II are relatively non-toxic.
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