DNA manipulation and data analyses
Manipulation of genomic DNA and plasmids and DNA cloning were performed
as described by Sambrook and Russell (2001). Restriction enzymes
(TaKaRa) were used for DNA digestion and modification. DNA sequencing
was performed by Macrogen (Seoul). DNA sequences were analyzed with the
BLAST program at the National Center for Biotechnology Information (Gish
and States, 1993), MEGALIGN (DNASTAR, Madison, WI, USA), and GENETYX-WIN
software (Genetyx).