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  • Title: Mapping of sequential epitopes recognized by monoclonal antibodies on the bovine leukaemia virus external glycoproteins expressed in Escherichia coli by means of antipeptide antibodies.
    Author: Ban J, Czene S, Altaner C, Callebaut I, Krchnak V, Merza M, Burny A, Kettmann R, Portetelle D.
    Journal: J Gen Virol; 1992 Sep; 73 ( Pt 9)():2457-61. PubMed ID: 1383413.
    Abstract:
    A lambda gt11 cDNA library prepared from bovine leukaemia virus (BLV)-producing ovine cells was screened with a cocktail of anti-BLV gp51 monoclonal antibodies (MAbs). Four recombinant phages with inserts of about 2-5 kbp were isolated. One, lambda BLV-gp51-1, was sequenced and shown to encode the C-terminal part of gp51 and all of gp30. This insert was subcloned into pEV-vrf1 and expressed in Escherichia coli N-4830-1 cells. The BLV product and a series of antipeptide antibodies were used to localize the sequential epitopes defined on BLV envelope glycoprotein gp51 by their reactivity with MAbs. Epitope B was localized to amino acids 180 to 205, B' to residues 195 to 205, D and D' to residues 218 to 237, and A to amino acids 249 to 260. All the mapped sequential epitopes were localized in the C-terminal half of BLV gp51. The results of epitope mapping with bacterially produced gp51 confirm the map obtained using native viral glycoprotein.
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