Research Article

Immunogenicity and Protective Efficacy against Murine Tuberculosis of a Prime-Boost Regimen with BCG and a DNA Vaccine Expressing ESAT-6 and Ag85A Fusion Protein

Figure 1

Construction of recombinant plasmids. Genes encoding ESAT-6, Ag85A, the fusion protein of ESAT-6, and Ag85A with a 45 bp linker, were cloned from M. tuberculosis H37Rv genomic DNA, respectively (A). The PCR products of the fusion genes were inserted into the BamHI and EcoRI sites of pProExHTb or pcDNA3.1, resulting in the recombinant plasmids pPro685A and pcD685A, respectively. The recombinant plasmids were identified by enzyme digestion (B). Lane M: DNA molecular marker; lane A1: PCR product of esat-6; lane A2: PCR product of fbpA; lane A3: PCR product of esat-6-fbpA; lane B1: products of pPro685A digested with enzymes; lane B2: products of pcD685A digested with enzymes.
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