Table 1. Environmental conditions and pharmacological concentrations.

Nocodazole 0.01 µg/ml	Nocodazole 0.1 µg/ml	Nocodazole 1 µg/ml	Nocodazole 10 µg/ml
Colchicine 1 µg/ml	Colchicine 10 µg/ml	Taxol 1 µg/ml	Taxol 10 µg/ml
Neg Control	Cytochalasin D 1 µg/ml	Cytochal. D 10 µg/ml	Cytochalasin 50 µg/ml
Iodoacetate 1 µg/ml	Iodoacetate 10 µg/ml	Iodoacetate 20 µg/ml	Iodoacetate 40 µg/ml
pH 5	pH 6	pH 8	pH 9
77 Osm	154 Osm	428 Osm	508 Osm
KCN 20 µg/ml	KCN 200 µg/ml	TFN 5 µg/ml	Cyclohex. 10 µg/ml