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Abstract
Epstein-Barr virus (EBV) nuclear antigen-1 (EBNA-1) is essential for maintenance of EBV latency. Four mouse monoclonal antibodies (mAbs) against the part of the EBNA-1 sequence (amino acids 451–641) containing the domain that forms a homodimeric eight-stranded β-barrel were generated and characterized, examined for immunocytochemical staining, immunoblotting and isoelectric focusing of EBNA-1 proteins, and used to examine interactions between EBNA-1 polypeptides by far-Western blot assays. Far-Western blot analyses using the mAbs suggest that both the β-strand (aa 593–604) and α helix (aa 568–582) are essential for EBNA-1 dimerization, consistent with yeast two-hybrid studies of mutant EBNA-1 polypeptides. These mAbs should be useful for studies on the structure and function of EBNA-1 proteins.
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