5001000150020002500M13 fwdAmpR promoterlacZαoriAmpRTGGC overhangBbsI siteATGA overhanglac operatorM13 revlac promoterMCSBbsI sitepUC19 backbone forward (19 .. 42)pUC19 backbone reverse (2627 .. 2644)BbsI (14)BbsI (2644)pUC19 backbone2662 bp