title: Synthesis and biological activity of beta-endorphin and analogues. Additional evidence for multiple opiate receptors.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism; D004723:Endorphins / Q000138:chemical synthesis* / Q000494:pharmacology; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009270:Naloxone / Q000378:metabolism; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects* / Q000378:metabolism; D013329:Structure-Activity Relationship; D014649:Vas Deferens / Q000187:drug effects
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid; D009270:Naloxone