To construct pBE1570, the following linker was cloned using
EcoNI to XhoI into pACYCDuet (EMD4Biosciences): AAATTAATACGACTCACTATAGGGGAATTGTGAGCGGATAACAATTCCCCTTTGACAGCTAGCTCAGTCCTAGGTATAATGACTAGAAATAATTTATGTTTACACTTTAATAAGGAAGATCTCATATGAAGCTTGTCGACC.
For expression and purification of his-tagged enzymes,
codon-optimized genes were subcloned into T7 vector pTA925 (Johnson
et al., 2001) using BglII and HinDIII sites, and transformed into E. coli
BL21 DE3 RIL (Stratagene). The resulting protein production strains
were BE1126, BE1165, BE1572 and BE1575 (Table 1). All the clones
described above were verified by DNA sequencing