Calcium mobilization.

Supernatants from CD40-stimulated tumor cells (Sup1 and Sup3) induce calcium mobilization on activated T cells. Supernatants were concentrated and used at 75% vol/vol. Recombinant MDC and TARC were used at 500 ng/mL. The x-axis indicates time (300 seconds). The y-axis indicates percentage of responding cells calculated after subtraction of background levels.