title: Peptide purification by gel filtration in aqueous pyridine--ammonia.
mesh_terms: D000641:Ammonia; D002850:Chromatography, Gel; D008722:Methods; D010455:Peptides / Q000302:isolation & purification*; D011725:Pyridines
chemical_list: D010455:Peptides; D011725:Pyridines; D000641:Ammonia