2.5 Amplification of XYL2 gene
The C. shehatae XYL2 gene was amplified from the genomic DNA by PCR amplification. Oligonucleotide primers (forward: 5’GGGGAATTCATGACTGCTAACCCTTCG3’ and reverse: 5’GGATCCCTATTCAGGGCCATCAAT 3’) were derived from the published sequence of the C. shehatae XLY2 gene (Genbank accession no. FJ040172.1). The EcoRI restriction site was added to the 5’ end of the gene and the BamHI restriction site was added to the 3’ end of the gene. The DNA was amplified in 50-ml reaction mixtures. Each reaction contained 100 ng of template DNA, 0.3 mM of each primer, 1 × AccuPrime™ Pfx Reaction mix (including dNTP) supplemented with 0-5 mM MgSO4 and 0-1 M KCl, and 2.5 U AccuPrimeTM Pfx DNA polymerase. Thirty cycles of denaturation, annealing and polymerization were carried out for 15
sec at 95 °C, 43 °C and 68 °C, respectively. The PCR products were excised from the gel and purified with the QIAquick Gel Extraction Kit (Qiagen) according to the manufacturer’s instruction.
2.5 Amplification of XYL2 gene
The C. shehatae XYL2 gene was amplified from the genomic DNA by PCR amplification. Oligonucleotide primers (forward: 5’GGGGAATTCATGACTGCTAACCCTTCG3’ and reverse: 5’GGATCCCTATTCAGGGCCATCAAT 3’) were derived from the published sequence of the C. shehatae XLY2 gene (Genbank accession no. FJ040172.1). The EcoRI restriction site was added to the 5’ end of the gene and the BamHI restriction site was added to the 3’ end of the gene. The DNA was amplified in 50-ml reaction mixtures. Each reaction contained 100 ng of template DNA, 0.3 mM of each primer, 1 × AccuPrime™ Pfx Reaction mix (including dNTP) supplemented with 0-5 mM MgSO4 and 0-1 M KCl, and 2.5 U AccuPrimeTM Pfx DNA polymerase. Thirty cycles of denaturation, annealing and polymerization were carried out for 15
sec at 95 °C, 43 °C and 68 °C, respectively. The PCR products were excised from the gel and purified with the QIAquick Gel Extraction Kit (Qiagen) according to the manufacturer’s instruction.
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