
Conantokins are a small family of helical peptides, rich in γ-carboxyglutamate (Gla) amino acid residues. They are derived from the venom of predatory marine snails of the genus Conus. Conantokins act as potent and specific antagonists of the N-methyl-D-aspartate receptor (NMDAR). They are the only naturally-derived peptides to do so. The subtype...
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http://en.wikipedia.org/wiki/Conantokins

Class of small peptides (17-21 residues) from Conus spp. that inhibit NMDA class of glutamate receptors.
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http://www.encyclo.co.uk/visitor-contributions.php
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