studies to characterize the fractionated cell populations according to their sensitivity to anti-theta-serum , to the presence of ig-receptors and to the phytohemagglutinin stimulation indicate that the antibody producing cells and the antigen binding cells have to be attributed to b-cells whereas the question whether the antigen stimulated cells are t- or b-cells can not be definitely answered .
C0021027
ig
C1148575
antigen binding