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. 1987 Jul;61(7):2280–2285. doi: 10.1128/jvi.61.7.2280-2285.1987

Biochemical and immunological characterization of the duck hepatitis B virus envelope proteins.

H J Schlicht, C Kuhn, B Guhr, R J Mattaliano, H Schaller
PMCID: PMC283693  PMID: 3586133

Abstract

To examine the envelope proteins of duck hepatitis B virus (DHBV), which are encoded by the pre-S/S open reading frame of the viral genome, an antiserum was raised in rabbits against a fusion protein comprising most of the pre-S coding segment. By using this antiserum, viral particles could be precipitated from serum, and two pre-S proteins with molecular sizes of approximately 35 and 37 kilodaltons were detected in the sera and livers of DHBV-infected ducks after Western blotting and after biosynthetic labeling of a primary duck liver cell culture. In serum, the pre-S proteins were shown to exist predominantly in DHBV-DNA-free particles associated with a 17-kilodalton protein which, by N-terminal amino acid sequence analysis, was shown to represent the viral S protein which is encoded by the 3' proximal segment of the DHBV pre-S/S open reading frame. To compare the immunogenic potential of the S and pre-S proteins, serum particles and gel-purified S protein were used to immunize rabbits. In neither case was a significant immune response against the DHBV S protein observed. However, a good antibody titer against DHBV pre-S was obtained even after immunization with small amounts of the pre-S antigen.

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Selected References

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