The bacterial strains were cultured by inoculating 1% of a fresh stationary culture into 10 mL lwMRS broth and incubating in anaerobic conditions. DNA was isolated from the LAB strains after overnight culture. After washing the cells with 10 mL of deionized water, the pellet was suspended in 1 mL of 5 M LiCl and incubated for 1 h at room temperature with constant shaking. The cells were washed once more with 1mL of deionizedwater, and the pelletwas suspended in 1 mL of TES buffer (25 mM sucrose, 50 mM Tris HCl, pH 8.0, 10mMEDTA) with 10 mg/mL of lysozyme before incubating for 1 h at 37 C. The sample was centrifuged, and the genomic DNA was obtained using a NucleoSpin Tissue XS kit (MachereyeNagel, GmbH & Co., Düren, Germany) according to the manufacturer's instructions.