The autolysin activity of B. thuringiensis strain was evaluated by the method of Raddadi et al. (2004) with a few modifications. Briefly, the cells grown in LB broth were harvested atOD600 1.2. The cells were washed inMES (2-Nmorpholino-ethansulfonic acid 50 mM, pH 6), resuspended in the same buffer, in potassium phosphate buffer (50 mM, pH 6.5) or Tris–HCl (50 mM, pH 8.5) buffers and incubated at 30C without agitation.
With regard to AHL-lactonases, primers from the literature (Lee et al. 2002) were used to screen for the presence of aiiA homologue gene. Genomic DNA was isolated from B. thuringiensis using the standard method described by Sambrook and Russell (2001).
The autolysin activity of B. thuringiensis strain was evaluated by the method of Raddadi et al. (2004) with a few modifications. Briefly, the cells grown in LB broth were harvested atOD600 1.2. The cells were washed inMES (2-Nmorpholino-ethansulfonic acid 50 mM, pH 6), resuspended in the same buffer, in potassium phosphate buffer (50 mM, pH 6.5) or Tris–HCl (50 mM, pH 8.5) buffers and incubated at 30C without agitation. With regard to AHL-lactonases, primers from the literature (Lee et al. 2002) were used to screen for the presence of aiiA homologue gene. Genomic DNA was isolated from B. thuringiensis using the standard method described by Sambrook and Russell (2001).
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