Bacterial strains and DNA extraction: The bacterial strains
investigated in this study were purchased from Korea Culture Center
of Microorganisms. Vibrio sp were grown on brain heart infusion
broth (BHI; Difco) supplemented with 1% (w/v) NaCl at 37oC for
24hr. The cell pellet, from 10 ml overnight culture, was used for
extraction of DNA. Genomic DNA was extracted using Bio 101 systems
GNOME® kit (Q-Bio gene) and the DNA concentration was determined
using a spectrophotometer (Shimadzu) at 260 nm wavelength.