L1210/0 cells are maintained in an exponential suspension culture at 37 ℃ in a humidified atmosphere of 5% CO 2 in McCoy's medium 5a (modified), supplemented with 15% calfserum, and Fungizone. L1210/0 cells are incubated in Cisplatin (7 μg/mL) for 2 hr at 37 ℃. To measure growth inhibition, the cells are centrifuged, washed once, resuspended in fresh medium at 30 × 10 3 to 50 × 10 3 cells/mL, and incubated for 3 days. Cell numbers are determined on a Coulter Counter. An aliquot of cells is diluted with an equal volume of % trypan blue. Viability is recorded as the percentage of cells that has excluded trypan blue. Cells incubated with Cisplatin as above are also diluted into % agar and allowed to grow for 2 weeks when colonies are counted.