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Molecular analysis of zntA gene in E. coli strains. a PCR analysis of zntA using genomic DNA isolated from E. coli strains; b RT-PCR analysis of zntA using total RNA obtained from E. coli strains. Lanes 1 K-12, 2 SBVP1, 3 SBVP2, 4 SBVP3, 5 SBVP4
