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Clinical and Diagnostic Laboratory Immunology, March 2001, p. 283-287, Vol. 8, No. 2
Departments of Diagnostic
Medicine/Pathobiology1 and
Statistics,5 Kansas State
University, Manhattan, Kansas 66506; Intervet Incorporation, Millsboro,
Delaware 199662; School of Biological
Sciences, University of Nebraska, Lincoln, Nebraska
685883; and School of Veterinary
Studies, Murdoch University, Murdoch 6150, Australia4
Received 20 September 2000/Returned for modification 2 November
2000/Accepted 28 November 2000
Bovine immunodeficiency virus (BIV) and Jembrana disease virus
(JDV) are bovine lentiviruses that are closely related genetically. A
recombinant fusion protein containing the capsid protein of BIV
expressed in Escherichia coli was used to immunize mice and produce monoclonal antibodies. Six hybridomas specific for BIV capsid
protein were identified, and one antibody, designated 10H1, was
characterized further. Competitive binding assays were performed to
analyze the topography of antigenic determinants by enzyme-linked immunosorbent assay and demonstrated the existence of at least three
distinct antigenic determinants on capsid protein. The monoclonal antibody reacted specifically with both BIV capsid and the recombinant fusion protein in Western immunoblot analyses. However, it did not
react with the recombinant capsid fusion protein of JDV, indicating that BIV contains at least one unique epitope in the capsid protein that is absent in JDV. Further mapping of the epitope by chemical cleavage analysis identified that the epitope is located at the 6.4-kDa
N terminus of the 29-kDa capsid protein. This monoclonal antibody assay
will be valuable for distinguishing the two closely related
lentiviruses by Western blotting.
1071-412X/01/$04.00+0 DOI: 10.1128/CDLI.8.2.283-287.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Differentiation of Two Bovine Lentiviruses by a
Monoclonal Antibody on the Basis of Epitope Specificity

*
Corresponding author: Mailing address: Department of
Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, 1800 Denison Ave. Kansas State University, Manhattan, KS 66506. Phone: (785)
532-4603, Fax: (786) 532-4039. E-mail:
Minocha{at}vet.ksu.edu.
Contribution 00-362-J from the Kansas Agricultural Experiment Station.
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