The precore sequence of hepatitis B virus is required for nuclear localization of the core protein
N Aiba, M J McGarvey, J Waters, S J Hadziyannis, H C Thomas, P Karayiannis – 30 December 2003 – The cellular localization of the precore/core and core proteins was studied by immunofluorescence following transfection of 143 thymidine kinase‐negative (TK‐) and Hep‐G2 cells with expression constructs containing wild‐type (hepatitis B e antigen [HBeAg]‐positive) and precore mutant (HBeAg‐negative) sequences. Precore/core constructs with the wild‐type phenotype result in strong nuclear staining, while, in contrast, constructs expressing core antigen alone have strong cytoplasmic staining.