title: Enkephalin: structure--function relationships.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D004723:Endorphins / Q000378:metabolism; D004745:Enkephalins / Q000378:metabolism; D011485:Protein Binding; D011487:Protein Conformation; D011957:Receptors, Opioid / Q000378:metabolism; D013329:Structure-Activity Relationship; D013816:Thermodynamics
chemical_list: D004723:Endorphins; D004745:Enkephalins; D011957:Receptors, Opioid