Size and Physical Map of the Chromosome of Haemophilus Influenzae
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A variation of pulse-field electrophoresis, field-inversion gel electrophoresis, was used to determine the size and physical map of the chromosome of Haemophilus influenzae. The DNA of H. influenzae had a low G + C content (39%) and no restriction sites for the enzymes NotI or SfiI. However, a number of restriction enzymes (SmaI, ApaI, NaeI, and SacII) that recognized 6-base-pair sequences containing only G and C nucleotides were found to generate a reasonable number of DNA fragments that were separable in agarose gels by field-inversion gel electrophoresis. The sizes of the DNA fragments were calibrated with a lambda DNA ladder and lambda DNA restriction fragments. The sum of fragment sizes obtained with restriction digests yielded a value for the chromosome of 1,980 kilobase pairs. Hybridization of a labeled fragment with two or more fragments from a digest with a different restriction enzyme provided the information needed to construct a circular map of the H. influenzae chromosome.
Application of molecular techniques to the study of hospital infection.
Singh A, Goering R, Simjee S, Foley S, Zervos M Clin Microbiol Rev. 2006; 19(3):512-30.
PMID: 16847083 PMC: 1539107. DOI: 10.1128/CMR.00025-05.
Conservation of plasmid-encoded dibenzothiophene desulfurization genes in several rhodococci.
Labbe D, Bergeron H, Jones A, Greer C, Grossman M, Sankey B Appl Environ Microbiol. 1997; 63(7):2915-9.
PMID: 9212438 PMC: 168587. DOI: 10.1128/aem.63.7.2915-2919.1997.
Genetic characterization of trimethoprim resistance in Haemophilus influenzae.
de Groot R, Sluijter M, De Bruyn A, Campos J, Goessens W, Smith A Antimicrob Agents Chemother. 1996; 40(9):2131-6.
PMID: 8878594 PMC: 163486. DOI: 10.1128/AAC.40.9.2131.
Roux V, Raoult D J Bacteriol. 1993; 175(15):4895-904.
PMID: 8393009 PMC: 204943. DOI: 10.1128/jb.175.15.4895-4904.1993.
DNA fingerprinting of Streptococcus pneumoniae strains by pulsed-field gel electrophoresis.
Lefevre J, FAUCON G, Sicard A, Gasc A J Clin Microbiol. 1993; 31(10):2724-8.
PMID: 8253973 PMC: 265993. DOI: 10.1128/jcm.31.10.2724-2728.1993.