Receptors, Opioid, kappaDynorphinsReceptors, OpioidReceptors, Opioid, muBenzeneacetamidesReceptors, Opioid, deltaEthylketocyclazocineDiprenorphinePyrrolidinesMorphinansEnkephalin, D-Penicillamine (2,5)-EnkephalinsCyclazocineNaltrexoneButorphanolEnkephalin, Ala(2)-MePhe(4)-Gly(5)-BenzomorphansEtorphineNarcotic AntagonistsEnkephalin, Leucine-2-AlanineEnkephalin, LeucineDynamin INarcoticsNaloxoneEndorphinsAnalgesics, OpioidDiterpenes, ClerodaneImmunoglobulin kappa-ChainsAnalgesics, Non-NarcoticAnalgesicsGuinea PigsMorphineCHO CellsCricetinaeDose-Response Relationship, DrugRats, Sprague-DawleyImmunoglobulin Light ChainsNF-kappa BGene Rearrangement, B-Lymphocyte, Light ChainImmunoglobulin lambda-Chains