2.6 Construction of the expression vector
The yeast expression vector pSFAU was opened at the unique EcoRI/ BamHI site downstream of the SFA gene, which positions downstream of ADH2 promoter. Then the XYL2 gene of C. shehatae was inserted as an EcoRI/ BamHI fragment to generate the plasmid pSFAU-XDH (Figure 2). The recombinant plasmid was sent to sequencing at 1st Base Laboratory (Malaysia) in order to confirm the correction of the inserted gene. The primers Seq_SFA_1102-1121 (5’GAAGATTTGCATAACGGTG3’) and Seq_p GBDU_EcoRI50_RV (5¢GAACTTGCGGGGTTTTTC3’) were used for the sequencing reaction.