title: Failure of hypophysectomy to alter brain content of opioid peptides (endorphins).
mesh_terms: D000818:Animals; D001835:Body Weight; D001921:Brain / Q000378:metabolism*; D007016:Hypophysectomy; D008024:Ligands; D008297:Male; D009270:Naloxone / Q000378:metabolism; D009419:Nerve Tissue Proteins / Q000096:biosynthesis* / Q000378:metabolism; D010452:Peptide Biosynthesis; D010902:Pituitary Gland / Q000378:metabolism; D051381:Rats; D011957:Receptors, Opioid / Q000378:metabolism
chemical_list: D008024:Ligands; D009419:Nerve Tissue Proteins; D011957:Receptors, Opioid; D009270:Naloxone