title: Characterization of a plasma factor having opiate and immunoactivity like beta-endorphin.
mesh_terms: D001667:Binding, Competitive; D001681:Biological Assay; D004723:Endorphins / Q000097:blood* / Q000276:immunology / Q000378:metabolism; D004745:Enkephalins / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D011957:Receptors, Opioid / Q000378:metabolism
chemical_list: D004723:Endorphins; D004745:Enkephalins; D011957:Receptors, Opioid