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We have determined the first complete nucleotide sequence of the mitochondrial genome of a venomous mollusc, the Conoidean gastropod, Lophiotoma (Xenuroturris) cerithiformis. It is 15,380 nucleotide pairs (ntp) and encodes 13 proteins, two ribosomal RNAs and 22 tRNAs of the mitochondrion's own protein synthesizing system. The protein mRNAs, ribosomal RNAs and 13 of the tRNAs are transcribed from the...
Peptide de7a was purified from the venom of Conus delessertii, a vermivorous cone snail collected in the Yucatan Channel, Mexico. Its amino acid sequence was determined by automatic Edman degradation after reduction and alkylation. The sequence shows six Cys residues arranged in the pattern that defines the O-superfamily of conotoxins, and several post-translationally modified residues. The determination...
We describe the purification and biochemical characterization of three components from the venom of the toxoglossate gastropod Terebra subulata. The three polypeptide venom components, augertoxins s6a, s7a and s11a, are 40-41AA in length with 3-4 disulfide linkages. The arrangement of Cys residues is reminiscent of certain conopeptide superfamilies, but molecular cloning failed to show the highly...
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