title: Naturally occurring antiglobulin factors in virus neutralization: homoreactant as a factor enhancing neutralization of the infectious complex of poliovirus with the Fab' antibody fragment.
abstract: A factor present in normal rabbit sera enhanced the neutralization of the infectious complex of poliovirus with the pepsin Fab' fragment of rabbit immunoglobulin G (IgG) antibody but showed no activity for the infectious complex of the same virus with IgG antibody. The factor was associated with IgG, and its activity was inhibited by the pepsin Fab' fragment of normal rabbit IgG. The data suggest that the enhancing factor belongs to naturally occurring antiglobulin to the homologous Fab' fragment (pepsin homoreactant).
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000032:analysis*; D000936:Antigen-Antibody Complex; D007140:Immunoglobulin Fab Fragments; D007074:Immunoglobulin G / Q000378:metabolism; D066298:In Vitro Techniques; D009500:Neutralization Tests; D011051:Poliomyelitis / Q000276:immunology*; D017955:Poliovirus / Q000276:immunology*; D011817:Rabbits
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000936:Antigen-Antibody Complex; D007140:Immunoglobulin Fab Fragments; D007074:Immunoglobulin G