Both 5′ ends of the phosphorylated synthetic MTS1_03028 fragments optimized for E. coli codons were ligated with SmaI and pGEM7zf (+) and digested with T4 DNA ligase. The product was then transformed into Mach1-competent E. coli. A hundred microliters were spread onto LB agar containing 100 μg/ml ampicillin and statically incubated at 37°C overnight. The plasmids were then isolated and designated pGEM-03028.
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