ON THE SEROLOGICAL SPECIFICITY OF PEPTIDES. II.

In continuation of previous studies immune sera for azoproteins made from aminobenzoyl dipeptides and tripeptides were tested with various peptide azoproteins by precipitin tests and with nitrobenzoyl derivatives of peptides by means of inhibition reactions. When examined with the latter method, the immune sera exhibited a high degree of specificity and permitted the recognition of distinctions among peptides of similar structure.