title: Endorphins are stored in biologically active and inactive forms: isolation of alpha-N-acetyl peptides.
mesh_terms: D000107:Acetylation; D000818:Animals; D004723:Endorphins / Q000302:isolation & purification / Q000378:metabolism*; D013058:Mass Spectrometry; D010902:Pituitary Gland / Q000032:analysis / Q000378:metabolism*; D013329:Structure-Activity Relationship; D013552:Swine
chemical_list: D004723:Endorphins