title: Specific antiserum to Leuenkephalin and its use in a radioimmunoassay.
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D007106:Immune Sera; D007930:Leucine; D009842:Oligopeptides / Q000032:analysis* / Q000276:immunology; D011817:Rabbits / Q000276:immunology; D011863:Radioimmunoassay / Q000379:methods; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D007106:Immune Sera; D009842:Oligopeptides; D007930:Leucine