title: Purification and characterization of the multiple forms of beta-galactosidase of Escherichia coli.
mesh_terms: D002021:Buffers; D002499:Centrifugation, Density Gradient; D055598:Chemical Phenomena; D002621:Chemistry; D002850:Chromatography, Gel; D004269:DNA, Bacterial / Q000032:analysis; D004589:Electrophoresis, Disc; D004926:Escherichia coli / Q000201:enzymology*; D005696:Galactosidases / Q000032:analysis / Q000302:isolation & purification; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007527:Isoenzymes / Q000032:analysis / Q000302:isolation & purification; D008722:Methods; D008854:Microscopy, Electron; D008970:Molecular Weight; D011489:Protein Denaturation; D012329:RNA, Bacterial / Q000032:analysis; D014461:Ultracentrifugation; D014508:Urea
chemical_list: D002021:Buffers; D004269:DNA, Bacterial; D007527:Isoenzymes; D012329:RNA, Bacterial; D014508:Urea; D005696:Galactosidases