Fig. 2
From: Reactivation of occult hepatitis B virus infection in a renal transplant recipient
Alignment of the studied HBsAg amino-acid sequence to the closest reference isolate (amino acids 1–226). The studied HBV genome sequence was analysed against online HBV-drug resistance data (http://www.hiv-grade.de/hbv_grade/deployed/grade.pl?program=hbvalg). Above and below are the amino acid sequences of HBsAg for the closest reference isolate and our HBV strain, respectively. The one-letter amino-acid code is shown only for positions different to the consensus sequence. Identical positions are denoted by ".". Positions for which no patient sequence data were available are denoted by "–". Sixteen amino acid substitutions were identified in the HBV surface (S) protein: S6L, V18G, E44G, M47T, Y100C, Q101H, T118K, I126N, P142L, V159A, R160K, S171Y, S174N, A177V, I213L, and F220C. Substitutions of Y100C, I126N, and P142L (red) are HBsAg escape mutations