Fig. 3
From: A cell-based ribozyme reporter system employing a chromosomally-integrated 5′ exonuclease gene
Schematic of genome integration (a) and DNA fragment for E. coli BL21(DE3) lacZ and arsB gene integration (b and c, respectively). Elements in part A are not to scale, whereas elements in B and C are drawn to scale (bar = 500 bp)