Role of Opioid Peptides in Behavior of Invertebrates

  title={Role of Opioid Peptides in Behavior of Invertebrates},
  author={Varvara E. Dyakonova},
  journal={Journal of Evolutionary Biochemistry and Physiology},
  • V. Dyakonova
  • Published 1 July 2001
  • Biology
  • Journal of Evolutionary Biochemistry and Physiology
Opioid peptides have been revealed in representatives of practically all large taxonomic groups of invertebrates, and the opiate receptors are found even in unicellulars. The opioid system seems to belong to the evolutionary ancient signal systems. The comparative data indicate that the most conservative and ancient function of opioids is control of the adequate level of protective reactions. In the infusorian Stentor the opiate ligands suppress a contractile response to mechanical stimulation… 

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