Fig. 3.
Replacement of xenogeneic CD40L transfectants with recombinant, trimeric, soluble CD40L.
The generation of CD40–B cells was studied by means of CD40L-transfected NIH3T3 cells (panel A) or GMP-grade soluble trimeric CD40L (panel B) under varying concentrations of clinical-grade rhIL-4 (shown here: 0 [filled circles], 2 [filled squares], and 10 [filled diamonds] ng/mL). A representative experiment of 3 experiments is shown.