Randomly Amplified Polymorphic DNA (RAPD) Fingerprinting PCR
The RAPD fingerprinting method established to study H. pylori strains [27], was used to compare the diversity of the DNA sequences among the Helicobacter strains tested. This method uses arbitrary oligonucleotide sequences to prime DNA fragments from the whole genome. We used 20 ng genomic DNA from each strain as template, 20 pmol of each primer (Table S1), 1U Taq DNA-polymerase (Qiagen, Hilden, Germany) and 250 µM from each dNTP, 1×buffer, and sterilized double distilled water for a total volume of 50 µL. A Perkin-Elmer thermal cycler model 9700 was used for amplification reactions. The cycling program was four cycles of 94°C, 5 min; 40°C, 5 min; 72°C, 5 min; low stringency amplification, and a final incubation at 72°C for 10 min.
Randomly Amplified Polymorphic DNA (RAPD) Fingerprinting PCRThe RAPD fingerprinting method established to study H. pylori strains [27], was used to compare the diversity of the DNA sequences among the Helicobacter strains tested. This method uses arbitrary oligonucleotide sequences to prime DNA fragments from the whole genome. We used 20 ng genomic DNA from each strain as template, 20 pmol of each primer (Table S1), 1U Taq DNA-polymerase (Qiagen, Hilden, Germany) and 250 µM from each dNTP, 1×buffer, and sterilized double distilled water for a total volume of 50 µL. A Perkin-Elmer thermal cycler model 9700 was used for amplification reactions. The cycling program was four cycles of 94°C, 5 min; 40°C, 5 min; 72°C, 5 min; low stringency amplification, and a final incubation at 72°C for 10 min.
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