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  • Title: Restriction fragment fingerprint and genome sizes of Staphylococcus species using pulsed-field gel electrophoresis and infrequent cleaving enzymes.
    Author: Poddar SK, McClelland M.
    Journal: DNA Cell Biol; 1991 Nov; 10(9):663-9. PubMed ID: 1684504.
    Abstract:
    Large restriction fragments of genomic DNA from Staphylococcus species were separated by pulsed-field gel electrophoresis (PFGE). Five different strains of S. aureus (ISP8, SAU3A, PS96, ATCC 6538, ATCC 15564) and three representative strains of S. haemolyticus SM102, S. warneri MCS4, S. cohnii LK478 from human hosts, and one strain of S. aureus (ATCC 8432) from an avian host were used in this study. Since Staphylococcus is A + T rich (approximately 67%), restriction fragments were obtained by digesting chromosomal DNA with endonucleases that recognize GC-rich sequences. Five enzymes Csp I, Sma I, Ecl XI, Ksp I, or Sac II were used for generation of few (7 to 16) distinctly separated fragments, with average sizes in the range of 200-300 kb. The size distribution of restriction fragments for each enzyme for each strain produced a strain-identifying fingerprint, and the genome size of each strain was determined from such restriction fragments separated by PFGE.
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