Figure 4.
DNA restriction analyses. A) i) Phi93 and Phi145 (DAM negative) cut with Dpn1 (cuts methylated GATC) and DpnII (cuts unmethylated GATC). ii) Phi145, Phi93 (MTase positive) and Phi15 (MTase negative) with HphI. B) i) Plasmid pPiM.93DAM cut with Dpn1 (cuts methylated GATC) and DpnII (cuts unmethylated GATC) under induced (I) and un-induced (NI) conditions. ii) Plasmid pPTPi (P), pPiM.145I cut with HphI under induced (I) and un-induced (NI) conditions. iii) Plasmid pPTPi (P), pPiM.145II cut with HphI under induced (I) and un-induced (NI) conditions.