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  • Title: Optimisation of Candida albicans typing by pulsed-field gel electrophoresis.
    Author: Hong E, Leung P.
    Journal: Br J Biomed Sci; 1998 Dec; 55(4):231-7. PubMed ID: 10436536.
    Abstract:
    Six strains of Candida albicans were subjected to pulsed-field gel electrophoresis (PFGE) using the CHEF-DRIII system (BioRad). Hansenula mingei YB-4662-VIA and Saccharomyces cerevisiae YNN 295 (BioRad) were used as size markers (1.05-3.13 and 0.22-2.2 megabase pairs [Mbp] respectively) for comparison of DNA molecules. The DNAs were resolved by a three-block protocol with pulse times of 120 s for 24 h, 240 s for 36 h and 300 s for 17 h. The voltage was set at 4.5 V/cm for the first two blocks and 4.0 V/cm for the final block. PFGE was carried out under these conditions using different agarose concentrations, types and concentrations of buffer, temperatures, and sizes of agarose gel plug. The resolution and mobility of DNAs were affected by some of these variables. Separation of C. albicans by PFGE was optimal at 12 degrees C with 1.0 x Tris-borate-EDTA (TBE) buffer using 1.2% agarose. Resolution of banding patterns was dependent on size of DNA plug used.
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