CD40 expression by MPC-11 and S107 plasmacytoma cell lines.

Data are representative of 3 independent experiments. (A) Exponentially growing MPC-11 and S107 murine plasmacytoma cells as well as normal murine splenocytes were stained with the anti-CD40–FITC (clone HM40-3)–conjugated mAb (solid lines) or with an appropriate isotype-matched antibody (dashed lines). (B) Expression of the CD40 on MPC-11 and S107 cells cocultured for 24 hours with either CL7.1/mCD40L or CL7.1/neo.