title: A search for high molecular impurities in penicillin G.
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis*; D002850:Chromatography, Gel; D002855:Chromatography, Thin Layer; D003956:Dialysis; D005374:Filtration; D008567:Membranes, Artificial; D010400:Penicillin G / Q000032:analysis / Q000592:standards*; D011492:Protein Hydrolysates; D013057:Spectrum Analysis; D014466:Ultraviolet Rays
chemical_list: D001426:Bacterial Proteins; D008567:Membranes, Artificial; D011492:Protein Hydrolysates; D010400:Penicillin G