Formation of covalent C3b-tetanus toxin complexes: a tool for the in vitro study of antigen presentation.


A novel method is described for the formation and purification of covalent complexes between the complement component C3b and an antigen (tetanus toxin, TT), using purified proteins in fluid phase. C3b is generated in situ by tryptic cleavage of C3 after co-precipitation of C3 and TT in the presence of polyethylene glycol. Various parameters were analysed… (More)


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