PreC-C Primers encompass described PreC-C mutations: mutation G1896A in the PreC region and mutations A1762T and G1764A in C-gene promotor. Primers were modified according to literature-based alignment, in order to optimize the amplification of all HBV genotypes. Sequence analysis at position 1762, 1764 et 1896 allows to determine sample wild type or mutant sequence (i.e. HBeAg expression or not, respectively). It is also possible to describe others rare punctual mutations. Furthermore, the sequence analysis also allows assessing HBV genotyping.