Fig. 3From: Development of a dual-expression vector facilitated with selection-free PCR recombination cloning strategyExpression of EGFP cloned in pOmni in E. coli BL21. EGFP gene was cloned into pOmni by means of selection-free PCR recombination cloning. All BL21 transformants showed strong green florescence under long-wave ultraviolet lightBack to article page