Occult Hepatitis B Infection among Hemodialysis Patients in Tabriz, Northwest of Iran: Prevalence and Mutations within the S Region

Figure 3

The amino acid sequence alignment of the HBV S gene as compared to the reference sequence. The OBI number is shown next to each patient sample separately. A pink box indicates the sequence of “a” determinant. Dots represent the identical amino acids as in the reference sequence, whereas letters represent the variations.