in view of recent evidence indicating that different t helper cells synergize for optimal antibody responses , a trifunctional antigen , n-2,4- dinitrophenyl-6-amino-caproyl-l-tyrosine-p-azobenze-p-arsonate- ( proline ) 9-l- tyrosine-p-azobenzene-p-arsonate ( dnp-sac-rat-pro ( 9 ) -rat ; or tri ) , was prepared to investigate the effect of adding a second rat epitope to bi-1 .
C0003320
antigen
C0003316
epitope