title: The analysis of endogenous opioid peptides with HPLC, radioreceptor assay, radioimmunoassay, and mass spectrometry.
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003782:Dental Pulp / Q000032:analysis; D004285:Dogs; D004723:Endorphins / Q000032:analysis*; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D010902:Pituitary Gland / Q000032:analysis; D011863:Radioimmunoassay / Q000379:methods; D011869:Radioligand Assay / Q000379:methods; D011957:Receptors, Opioid / Q000378:metabolism
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid