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An effort was made to immunize guinea pigs with arsanilic acid conjugates of copolymers of D- and L-alpha-amino acids; ASD-GAT and ASL-GAT. An immune response was observed only in the case of ASL-GAT. Antibodies specific for the arsanilic acid hapten were produced which could also react with ASD-GAT or ASGPA. These findings indicate that the proper metabolism of the antigen may be essential to the induction of the immune response.
Benacerraf et al. (Sun,) studied this question.