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Differences in the binding of opioids with the left and right visual cortex of the turtle


Doklady Akademii Nauk SSSR 291(2): 479-483
Differences in the binding of opioids with the left and right visual cortex of the turtle
A biochemical comparison of opiate receptors of the left and right visual cortex of the turtle Emys orbicularis was carried out. The binding of the specific opiate agonists of delta-type and kappa-type, D-Ala2,2D-Leu5-enkephalin (DADL) and ethyl ketocyclazocine (EK) with the visual cortex membranes was studied. The results pointed to a new kind of assymmetry which consists in the fact that, in most studied trutles, opiate receptors of one type (or with considerable affinity to their ligand) were situated on one side of the brain, while the receptors of the other type (or with a considerable affinity for the other ligand) on the other side of the brain. It cannot be ruled out that assymmetrically located opiate receptors (and/or the mechanisms of endogenous opioid capture) are involved in the mechanisms of the selective neurohumoral regulation of the structures and neurons located to the left or right of the central sagittal plane.


Accession: 005151109



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