A new recombination type of B/C genotype was discoved in hepatitis B virus
Objective To study the recombination type of B/C genotype in hepatitis B virus.Methods The PCR was applied to amplifed the whole genes of HBV through the serums of four chronic HBV carriers who come from Jinghong distict,Yunnan province.The whole HBV genomes were ligated with pMD18-T vector and trasformed to E.coli JM109.After the positive colones were picked up,the HBV genotypes and recombinated sites were discoved through sequenced the acquired positive colones.Results All the acquired sixteen HBV sequences from the four HBV carriers were genotype B which were combinated with genotype C in some region.There are two ways of the combinations.For the first one,a 496 bp fragment from genotype C taked place the genotype B at the place of nt1825 to nt2320 of precore C/C region.For the second way,a 695 bp fragment of genotype B taked place at the both sites of nt822 to nt1020 of P gene region and nt1825 to nt2320 of precore C/C region.Conclusion A new recombination type of B/C genotype in hepatitis B virus was reported for the first time.The new Bj subgenotype was combinated with genotype C not only at the region of precore C/C but also at the place of P gene region. 
 
Key words: 
Hepatitis B virus; Genotype; Recombination