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Ion-exchange chromatography method for the purification of genomic DNA fraction from Mycobacterium bovis Bacillus
Wang Jing1, Sun Shuhan, Hu Zhenlin
1Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.
Abstract:
The goal of this study was to provide practical strategies for purifying genomic DNA fraction from Mycobacterium bovis Bacillus Calmette-Guérin (BCG-DNA) by ion-exchange chromatography. A multistep process was developed to purify BCG-DNA. The process consisted of sonication, heating, trypsin digestion, ion-exchange chromatography, gel-filter chromatography, and lyophilization. After ion-exchange chromatography, BCG-DNA was highly purified and possessed potent biological effects. The methods described were efficient and had good reproducibility. Further, this was the first reported chromatography method to purify BCG-DNA.

