title: A new small myotoxin from the venom of the prairie rattlesnake (Crotalus viridis viridis).
abstract: Fast atom bombardment (FAB) mass spectrometry was used to identify a new small myotoxin from the venom of the prairie rattlesnake (Crotalus viridis viridis). FAB mass spectrometry and Edman degradation were used to characterize its structure. This toxin is similar to myotoxin I from C. v. concolor, except that it possesses an additional. C-terminal asparaginyl-alanine. At 45 residues it is the longest known myotoxin a homolog. A myotoxin of 43 residues, identical to myotoxin I from C. v. concolor, was also found. To date no other species has been shown to produce more than one length of myotoxin. The present paper documents 42-, 43-, and 45-residue myotoxins from the venom of a single animal.
authors: California Institute of Technology, Division of Biology, Pasadeńa 91125.
authors: P R
authors: PR
authors: Griffin
authors: S D
authors: SD
authors: Aird
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D003435:Crotalid Venoms / Q000737:chemistry / Q000302:isolation & purification*; D003488:Cyanogen Bromide; D008297:Male; D008969:Molecular Sequence Data; D009132:Muscles / Q000187:drug effects / Q000473:pathology; D010446:Peptide Fragments / Q000302:isolation & purification; D012689:Sequence Homology, Nucleic Acid; D012911:Snakes
chemical_list: D003435:Crotalid Venoms; D010446:Peptide Fragments; D003488:Cyanogen Bromide