Abstract
A full-length cDNA, Cjmdr1, which belongs to the multidrug-resistant (mdr) gene family, was isolated by nested RT-PCR from alkaloid-producing cultured cells of Coptis japonica. The cDNA is 4192 nucleotides long and has an ORF of 1289 amino acids. Northern analysis of the intact plant showed a clear preference in its expression in the rhizome, where alkaloids are highly accumulated compared to other organs.
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