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  • Title: Cross-reactivity of the NPa and NPb idiotypic responses of BALB/c and C57BL/6 mice to (4-hydroxy-3-nitrophenyl)acetyl (NP).
    Author: White-Scharf ME, Imanishi-Kari T.
    Journal: Eur J Immunol; 1982 Nov; 12(11):935-42. PubMed ID: 7151853.
    Abstract:
    A comparative antigenic analysis was carried out to determine whether cross-reactivity exists between the major idiotypic responses to (4-hydroxy-3-nitrophenyl)acetyl (NP) in BALB/c and C57BL/6 mice. Extensive cross-reactivity exists between the NPa (BALB/c) and NPb (C57BL/6) allotype-linked idiotypic responses to NP. The cross-reactive determinants of the NPb idiotype are confined to one particular group of NPb-positive monoclonal antibodies. The extent of cross-reactivity between this group of C57BL/6 antibodies and idiotype-positive monoclonal antibodies of BALB/c is so great that they cannot be readily distinguished as NPb- or NPa-positive antibodies with polyclonal anti-idiotypic reagents. That this cross-reactivity is not unique to monoclonal antibodies was confirmed by the demonstration of these cross-reactive determinants in the immunesera of individual BALB/c and C57BL/6 mice. Additionally, evidence was obtained from these experiments and from earlier ones from this laboratory which suggests that the BALB/c idiotypic response to NP-protein conjugate is more homogeneous than the C57BL/6 idiotypic responses.
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