Figure 1.
DNA substrates of end-joining assays. (A) The plasmid pUC18PD1/4 was digested with Eco47III and EcoRV, resulting in a blunt-ended linear molecule with a 10-bp direct repeat (ATCCTACAGC) at each end. Deletion of one 10-bp repeat in joined DNA will produce an XcmI restriction site. This particular restriction site can not be created by other joining reactions. (B) The plasmids pUC18-2-bp-repeat and pUC18-3-bp-repeat were digested with PshAI, resulting in blunt-ended linear molecules with a 2-bp (AG) or 3-bp (CAG), respectively, direct repeat at each end.
