Orcokinin (NFDEIDRSGFGFN) is a crustacean peptide eliciting potent myotropic effects in gut tissues. The first Orcokinin reported was NFDEIDRSGFGFN, isolated from abdominal nerve cord extracts of the crayfish Orconectes limosus[1].
References
[1] Pascual N, et al. Orcokinins in insects and other invertebrates. Insect Biochem Mol Biol. 2004 Nov;34(11):1141-6. DOI:10.1016/j.ibmb.2004.07.005
