[Electrophoretic bidimensional analysis in polyacrylamide gel of the tuberculoproteins present in IP and in various other preparations of PPD].
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Biomedical subjects
Publications and source records attributed to J Augier.
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The preparation of antigen L using culture filtrates of live BCG is described. The procedure consisted essentially of precipitating this filtrate with 10% trichloroacetic acid in the presence of N-butyl alcohol 4% final concentration. The precipitate was chromatographed on carboxy-methyl-trisacryl-M and then on DEAE-trisacryl-M; in both cases, maximal biological activity (delayed-type hypersensitivity) was found in the void volume. The product thus obtained was chromatographed on a molecular sieve so as to eliminate poorly active fractions. The final product was 30-fold more active on guinea-pigs sensitized with live BCG than on those sensitized with inactivated BCG.
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