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An excitatory peptide, di16a, with 49 amino acids and 10 cysteine residues was purified and characterized from the venom of Conus distans. Five AA residues were modified: one γ-carboxyglutamate (Gla), and four hydroxyproline (Hyp) residues. A cDNA clone encoding the precursor for the peptide was characterized; the peptide has a novel cysteine framework and a distinctive signal sequence that differs...
We have characterized the defining members of a novel subfamily of excitatory conotoxins, the short κA-conotoxins (κA S -conotoxins). κA-conotoxins PIVE and PIVF (κA-PIVE and κA-PIVF) were purified from Conus purpurascens venom. Both peptides elicited excitatory activity upon injection into fish. κA-PIVE was synthesized for further characterization. The excitatory effects of κA-PIVE in vivo...
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