bifunctional antigens composed of one l-tyrosine-p-azobenzenearsonate ( tyr-aba ) carrier epitope and one dinitrophenyl ( dnp ) haptenic epitope separated by 6-aminocaproyl or polyprolyl spacers induced weak igm anti-dnp plaque-forming cell ( pfc ) responses in the spleens of mice immunized intraperitoneally , without detectable igg pfc .
C0003320
antigens
C0003316
epitope