Abstract
Continuing our studies of the antigenicity of papillary cystadenocarcinoma of the ovary we have investigated the production of antibodies in rabbits immunized with a tissue lyophilisate. Ouchterlony double diffusion showed 4 precipitin lines, of which one cross-reacted with normal ovarian tissue, one was identical with the line developed with tissue culture cell sonicate antigen, and 2 additional lines were found only with the tumor homogenate. Immunoelectrophoresis indicated that one antigenic component had a mobility corresponding to α-globulin and one line appeared in the β-globulin region. Gel filtration on Sephadex G-200 yielded 6 fractions of which Fraction 1 and Fraction 3 were tumor specific. Fraction 1 gave one precipitin line against nonadsorbed serum to unfractionated tumor homogenate, Fraction 3 gave 2 nonidentical and distinct lines.
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