Cloning of Ogataea siamensis N22 xylose
reductase gene
Genomic DNA of O. siamensis N22 was
prepared and partial digested by Bsp143I. The
digested DNA fragments appeared about 1-3 kb in
size were collected and purified using QIAquick
Gel Extraction Kit (QIAGEN, USA) and
subsequently cloned into the pJET1.2/ blunting
vector (CloneJETPCR cloning kit, Fermentas,
USA), and were then introduced into Escherichia
coli XL1-Blue competent cells prepared as
described by Chung et al. (1989). Recombinant
colonies appeared on LB agar medium containing
100 µg/ml ampicillin after incubation at 37°C
were collected and subjected to plasmid DNA
preparation using the alkaline lysis method