Fig. 7. Vault-tube formation and the stability of microtubules. SW1573/MVP-GFP cells were cultured at 37°C for 60 minutes in the absence (a and d) or presence of 30 µM nocodazole (b and e) or 20 µM taxol (c and f). Subsequently, the cells were placed at 21°C for 60 minutes and monitored for vault-tube formation by fluorescence microscopy. Bar, 10 µm.