Research Article

The Investigation of HBV Pre-S/S Gene Mutations in Occult HBV Infected Blood Donors with anti-HBs Positive

Figure 1

Neighbor-joining phylogenetic tree analysis of OBI S genetic sequences. Analyses were based on 21 S region sequences from blood donors with OBI. Arabic numerals were suffixed with SX represented samples from OBI blood donors; others were reference sequences for multiple genotypes (A through H) from GenBank.