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  Indian J Med Microbiol
 

Figure 1: The fl uorescence intensity of plasmid DNA under berberine derivatives with different concentration. 0– 0 mol/L; 1– 3.9 × 10−6 mol/L; 2– 1.56 × 10−5 mol/L; 3– 6.25 × 10−5 mol/L; 4– 2.5 × 10−4 mol/L.

Figure 1: The fl uorescence intensity of plasmid DNA under berberine derivatives with different concentration. 0– 0 mol/L; 1– 3.9 × 10<sup>−6 mol/L;</sup> 2– 1.56 × 10<sup>−5</sup> mol/L; 3– 6.25 × 10<sup>−5</sup> mol/L; 4– 2.5 × 10<sup>−4</sup> mol/L.