title: Chromatofocusing for separation of beta-lactamases. I. Microscale separation of RTEM- and chromosomally mediated beta-lactamases of Escherichia coli J6-2.
mesh_terms: D002852:Chromatography, Ion Exchange; D004251:DNA Transposable Elements; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics; D007526:Isoelectric Point; D010957:Plasmids; D001618:beta-Lactamases / Q000302:isolation & purification*
chemical_list: D004251:DNA Transposable Elements; D001618:beta-Lactamases