Table II.

Rates Rearward Transport of Markers in the Lamella of Newt Lung Cells^*

		Rate of rearward movement (μm/min)
Marker in lamella		Control		20 mM BDM‡		2.5 μM Cytochalasin D§
DIC refractile ridges		0.42 ± 0.20 (n = 11)		0.13 ± 0.03 (n = 9)		0.14 ± 0.03 (n = 7)
Parallel MTs		0.46 ± 0.20 (n = 10)		0.10 ± 0.16 (n = 6)		0.07 ± 0.05 (n = 12)
Photoactived bar of C2CF tubulin		0.30 ± 0.11 (n = 8)		0.11 ± 0.08 (n = 6)
Beads on cell surface		0.41 ± 0.22 (n = 10)
MT plus ends (100 nM nocodazole)		0.39 ± 0.12 (n = 6)

^* Marker position measured relative to the leading edge of the cell.  

^‡ Data taken within 5 min after application of BDM.  

^§ Data taken 10–15 min after application of cytochalasin D.