The analysis of IgG1 response to peptides comprising the NTCP binding site (peptide A, amino acids 1–29) and the accessory domain involved in the inhibition of infection (peptide B, amino acids 30–61) or both sites (A + B, the genotype A peptide, amino acids 13–51) revealed a comparable reaction to the crucial region of the preS N-terminus (A + B) in all treated groups (Figure 3A). The gene discussed is SLC10A1; the disease is infection.