title: Isolation of beta-endorphin-related peptides from ox pituitary.
mesh_terms: D000818:Animals; D002417:Cattle; D004723:Endorphins / Q000302:isolation & purification*; D010902:Pituitary Gland / Q000032:analysis*; D013045:Species Specificity; D013552:Swine
chemical_list: D004723:Endorphins