FIG. 2.

(A) Immunoprecipitation pattern produced by the supernatant of a bacterial clone contaminating a stored blood sample. Well 1, rabbit anti-TMG antibody; wells 2, fresh serum sample from a blood donor, wells 3, supernatant of the broth of A. viridans; well 4, uninoculated brain heart infusion broth. (B) Immunoprecipitation pattern produced between purified substance and fresh serum from a blood donor. Well 1, fresh serum from a blood donor, wells 2, rabbit anti-TMG antibody, wells 3, supernatant of the broth of A. viridans, wells 4, purified substance from supernatant of the broth.