title: Analysis of peptides in tissue and plasma. Use of silicic acid extraction and reversed-phase columns for rapid purification prior to radioimmunoassay.
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004723:Endorphins / Q000032:analysis; D004743:Enkephalin, Leucine / Q000032:analysis; D004744:Enkephalin, Methionine / Q000032:analysis; D008297:Male; D010455:Peptides / Q000032:analysis* / Q000097:blood; D011863:Radioimmunoassay; D051381:Rats; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D010455:Peptides; D004744:Enkephalin, Methionine; D004743:Enkephalin, Leucine; D001615:beta-Endorphin