The genomic fragment, designated as BccLH, homologous with the BcpLH gene of Chinese cabbage was isolated from the total genomic DNA of Pac-choi by PCR method, with a pair of primer designed according to the sequence of BcpLH. BccLH gene was compared to BcpLH gene in the aspects of genomic DNA sequence, cDNA sequence, as well as amino acid sequence and secondary structure of protein. BccLH gene is 1544bp in length and has 96.1% homology with BcpLH gene. Southern blotting indicated that there is only one cop...