The npt II gene was a selectable marker
gene allowing the transformed shoots to grow in media
containing kanamycin. The cry1Ba3 gene fragment
was introduced into the expression vector
pCAMBIA2300, which carried the npt II gene, and then
transformed into Escherichia coli strain JM110. The
resulting plasmid was introduced into Agrobacterium
tumefaciens strain EHA105 by electroporation
(Mersereau et al. 1990). The T-DNA region of the
binary vector pCSBaN is shown in Fig. 1