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J Virol. 1982 April; 42(1): 135-142

Surface antigenic determinants of mammalian "hepadnaviruses" defined by group- and class-specific monoclonal antibodies.

ABSTRACT

The hepatitis B-like viruses (human hepatitis B virus, woodchuck hepatitis virus, ground squirrel hepatitis virus, and duck hepatitis B virus) are hepatotropic DNA viruses which have been referred to collectively as "hepadnaviruses." Using a murine monoclonal antibody (101-2) to the surface antigen of woodchuck hepatitis virus, we have shown that the surface antigens of mammalian hepadnaviruses (HBsAg, WHsAg, and GSHsAg) are antigenically related via a common determinant (HV/101). Furthermore, analysis with other monoclonal antibodies to WHsAg revealed that WHsAg and GHsAg are antigenically distinct, although the antigens had more determinants in common with each other than with HBsAg. The hepadnavirus group-specific antibody (101-2) reacted with HBsAg subtypic variants in a group-specific rather than subtype-specific manner. In conjunction with observations with an HBsAg-specific, group-reactive monoclonal antibody (BX259), the present data suggest that there are at least two group-reactive epitopes of HBsAg: one which is virus specific (HBV/259) and one which is common to two other mammalian hepadnaviruses (HV/101).