Table 2.

AtMRP1-dependent uptake of different GS-conjugates

GS-conjugate	AtMRP1-dependent uptake, nmol/mg per 10 min
DNP-GS	2.91  ±  0.42
GSSG	2.07  ±  0.71
Metolachlor-GS	4.44  ±  0.82
C3G-GS	7.85  ±  0.75

MgATP-dependent, uncoupler-insensitive uptake by DTY168/pYES3-AtMRP1 and DTY168/pYES3 membrane vesicles was measured and AtMRP1-dependent uptake was calculated as described in the legend to Fig. 5. All of the GS-conjugates were present at a concentration of 61.3 μM. Values shown are means ± SE (n = 3−6).