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J Virol. 1976 April; 18(1): 124-131

Characterization of the type and group specificities of the immune response in mice to murine leukemia viruses.

ABSTRACT

Normal sera from a variety of strains of inbred mice have precipitating antibodies to murine type C viruses that are detected by radioimmune precipitation assays. The results demonostrate that this humoral immune response is primarily directed against the AKR strain of murine leukemia virus (MuLV) proteins gp71, gp43, and p15(E). These sera also react with Friend- or Rauscher-MuLV in radioimmune precipitation assays. This reaction is not due to a separate immune response, but rather is primarily a consequence of the cross-reactivity of antibodies to the AKR strain of MuLV p15(E) with the p15(E) of these viruses. These data, using autogenous immune sera, emphasize the serological differences of the virion glycoproteins and the serological similarity of the p15(E) virion component of the viruses. Furthermore, based on the serological reactivities to the glycoproteins, the results suggest that the AKR strain of MuLV is endogenous to and expressed in mice, but that the Friend-Moloney-Rauscher virus group is not.

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