The amplified PCR products were separated on 1% agarose
gel along with 500 bp of DNA ladder (NEB, Beverly, MA). The
DNA sequencing was done using 50 ng PCR products having
8 ml of ready reaction mix (BDT v 3.0, Applied Biosystems,
Foster City, CA) and 5 p Mol of forward primer. The cycling
conditions used were as follows: 25 cycles of 96 C for 10 S,
50 C for 5 S and 60 C for 4 min. Samples were further washed
with 70% ethanol and kept suspended in Hi-Di formamide
(Applied Biosystems). The sequencing was carried out in ABI
prism 3100 Genetic Analyzer (Applied Biosystems). The sequences
were checked against the microbial nucleotide databases
using BLASTN search algorithm.15
2.5. Sequence alignments and homology
The 1132