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  • Title: Cloning and characterization of cDNA clones corresponding to transcripts from the BamHI G region of the Epstein-Barr virus genome and expression of BGLF2.
    Author: Chen MR, Hsu TY, Lin SW, Chen JY, Yang CS.
    Journal: J Gen Virol; 1991 Dec; 72 ( Pt 12)():3047-55. PubMed ID: 1662696.
    Abstract:
    A cDNA library was constructed from poly(A)+ RNA isolated from the iododeoxyuridine-treated P3HR1 cell line. Five cDNA clones, which hybridized with the BamHI G fragment of Epstein-Barr virus (EBV) DNA, were subcloned and sequenced. Clones G2, G3 and G4 corresponded to the BGLF2 open reading frame (ORF) of EBV (B95-8, nucleotides 126,837 to 125,866); G3 was found to contain the entire BGLF2 ORF. The predicted Mr of the putative protein product of the EBV B95-8 BGLF2 ORF is 36K. Complete nucleotide sequencing of G3 revealed that there were two nucleotide changes from the reported sequence of the EBV B95-8 BGLF2 gene, but these did not alter the predicted amino acid sequence of the products. Clone G3 and a cDNA derived from it by N-terminal deletion were expressed in Escherichia coli, producing fusion proteins. Rabbit antisera against these proteins were shown to react with viral capsid antigen-expressing HR1 cells in an indirect immunofluorescence assay. In vitro transcription/translation products and fusion proteins expressed in E. coli were used to determine the presence of antibodies in sera from EBV-infected individuals. The results of immunoprecipitation and immunoblotting studies showed that the majority of EBV-seropositive individuals mount a serum antibody response to the BGLF2 ORF-encoded protein.
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