Table 2. Percentage of live/apoptotic/dead cells in 100 µm optical section of 300-600 µm diameter UMR-106 tumor spheroids.

10 µg/mL	Percent of cells after a 3 hr* or 4 hr** incubation (±S.E.M)
	Live	Apoptotic	Dead
**Control	89.6 ± 2.2	8.3 ± 1.7	1.7 ± 0.68
**Colchicine	65.9 ± 2.7	28.2 ± 2.3	5.7 ± 1.5
**Paclitaxel	63.1 ± 2.4	27.6 ± 1.4	9.1 ± 1.8
**CytochalasinD	56.5 ± 4.6	33.1 ± 3.3	10.2 ± 1.6
*Nocodazole	71.6 ± 2.4	23.8 ± 2.4	4.3 ± 0.33
*Iodoacetate	57.4 ± 2.8	31.8 ± 2.8	10.9 ± 2.3