title: Isolation of E. coli R factor DNA by molecular sieve chromatography in 4 M guanidine hydrochloride.
mesh_terms: D002850:Chromatography, Gel; D004269:DNA, Bacterial / Q000302:isolation & purification*; D004270:DNA, Circular / Q000302:isolation & purification; D004926:Escherichia coli / Q000032:analysis* / Q000166:cytology; D006146:Guanidines; D008854:Microscopy, Electron; D009154:Mutation; D009691:Nucleic Acid Denaturation; D013056:Spectrophotometry, Ultraviolet; D014316:Tritium
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular; D006146:Guanidines; D014316:Tritium