Fig. 1 (abstract P-282).

Chase assay of IgG3-producing cells. The amounts of IgG in the medium (upper panel) and the cells (lower panel) were measured every 2 h after the inhibition of protein synthesis by cycloheximide. The amount of IgG in the medium hardly changed between 6 and 8 h; however, 30%–40% of IgG still remained in the cells compared with that at the starting point (0 h)