By the direct immunofluorescence technique 19 liver biopsies were examined for the presence of the e-antigen associated with the hepatitis B virus infection. With the use of double incubation and blocking experiments with FITC and Rhodamine labelled antisera against hepatitis B core antigen and e-antigen, evidence is presented that the e-antigen is localised in the nuclei of the hepatocytes. We conclude that the e-antigen and the core antigen are not identical, although they are often present simultaneously in the nucleus of the hepatocyte.
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Arnold et al. (1977) studied this question.