Fine specificity of antibodies to the synthetic polypeptide poly(l-tyrosine, l-glutamic acid)-poly(dl-alanine)--poly(l-lysine) and its ordered analogs as followed by solid-phase radioimmunoassay

Dedicated to Dr. Choh Hao Li on the occasion of his 70th birthday.
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Abstract

The fine specificity of antibodies against (T,G)-A--L and its ordered analogs (T-T-G-G)-A--L and (T-G-T-G)-A--L was studied. Fifty percent of the antibodies against (T,G)-A--L are directed toward the T-T-G-G determinants and 19% against T-G-T-G-like determinants. The rest of the antibody response to (T,G)-A--L is directed against determinants which exist in (T,G)-A--L but are not cross-reactive with either T-T-G-G- or T-G-T-G-like determinants. Although (T-T-G-G)-A--L and (T-G-T-G)-A--L differ only in the sequence of tyrosine and glutamic acid in their side chains, no crossreactivity was observed between antibodies toward the two ordered polypeptide antigens.

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