Table 1.

Rate constants for transferrin recycling in transfected TRVb cells loaded with the marker at either 37°C or 16°C

Transfected plasmid	Kr(37°C ➞ 37°C) min−1	Kr(16°C ➞ 37°C) min−1
Vector	0.058  ±  0.007	0.060  ±  0.001
Rab11-WT	0.036  ±  0.001	0.049  ±  0.006
Rab11-Q70L	0.035  ±  0.002	0.053  ±  0.001
Rab11-S25N	0.024  ±  0.002	0.027  ±  0.001
Rab11-ΔC	0.052  ±  0.004	0.051

First order rate constants (K_r) for transferrin recycling were determined from the data in Figs. 2 and 4 and are presented as the means ± SE of two separate experiments. The middle column gives the recycling rate constants at 37°C for transferrin molecules interiorized at 37°C [K_r (37°C ➞ 37°C)], and the rightmost column gives the rate constants for molecules interiorized at 16°C [K_r(16°C ➞ 37°C)].