title: A novel method for the isolation of mycobacterial DNA.
abstract: DNA was isolated from mycobacteria by a simplified procedure. Cells were suspended in 6 M guanidinium chloride, the suspension was cooled to -70 degrees C, then incubated at 65 degrees C for 10 min, cooled in ice, deproteinized by chloroform and DNA was recovered from the supernatant. The procedure was used to obtain DNA from several mycobacteria (1 x 10(9) or more cells) including Mycobacterium neoaurum, M. fortuitum, M. phlei and M. smegmatis. Each of the species was shown to have two ribosomal RNA operons per genome, and preliminary evidence was obtained which suggests that one of these operons is homologous with one of the operons of M. smegmatis.
authors.affiliation: Division of Mycobacterial Research, National Institute for Medical Research, Mill Hill, London, UK. r-cox@nimr.mrc.ac.uk
authors.forename: J A
authors.initials: JA
authors.lastname: González-y-Merchand
authors.forename: I
authors.initials: I
authors.lastname: Estrada-García
authors.forename: M J
authors.initials: MJ
authors.lastname: Colston
authors.forename: R A
authors.initials: RA
authors.lastname: Cox
mesh_terms: D001483:Base Sequence; D004262:DNA Restriction Enzymes / Q000032:analysis; D004269:DNA, Bacterial / Q000302:isolation & purification*; D019791:Guanidine; D006146:Guanidines; D008969:Molecular Sequence Data; D009161:Mycobacterium / Q000235:genetics*; D016133:Polymerase Chain Reaction
chemical_list: D004269:DNA, Bacterial; D006146:Guanidines; D004262:DNA Restriction Enzymes; D019791:Guanidine