title: Preparation of tritium labeled beta-endorphin suitable for studying brain receptor interactions.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D004723:Endorphins / Q000378:metabolism*; D007700:Kinetics; D008297:Male; D008745:Methylation; D011865:Radioisotope Dilution Technique; D051381:Rats; D011957:Receptors, Opioid / Q000378:metabolism*; D014316:Tritium
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid; D014316:Tritium