Fig. 1From: Easily-controllable, helper phage-free single-stranded phagemid production systemThe (A) VCSM13 helper phage DNA and (B) VCSM13ΔPS(PBAD-pII) DNA used in this study. The secondary structure of the M13 intergenic sequence is indicated in balloons. Dashed line indicates deletion. Ori, replication origin; kmr, kanamycin resistance gene; IG, intergenic sequence; PBAD, araBAD promoter; PC, araC promoterBack to article page