3. Result and discussion
3.1 Cloning of the gene XYL2 from C.shehatae The XYL2 gene, encoding xylitol dehydrogenase (Genbank accession number FJ040172.1,The purified target fragment was inserted into the EcoRI/ BamHI site of pSFAU, generating a pSFAU-XDH vector (Figure 2). The gene XYL2 was placed downstream of the existing SFA gene, and thus, sharing the same promoter (ADH1) with the SFA gene. The ligation product was used to transform the competent E. coli Top 10 cells. To verify the results, plasmids from the transformants were analyzed with the restriction NCBI Genbank) was amplified by polymerase chain reaction from the genomic DNA of C. shehatae TISTR 5843. The amplicon was visualized and the band with the length of about 1.1 kb was gel-purified (Figure 1).