Figure 2. Transport properties of PvHT_sal, PvHT_ind and Q167N mutant PvHT_ind in Xenopus laevis oocytes.

(A) Initial mean uptake rates (eight oocytes per concentration; mean±S.E.M.) of D-glucose are shown against concentration of substrate (representative of three experiments; see Table 1). (B) D-fructose used to compete for D-glucose transport. Uptake assays (mean±S.E.M. of 8 oocytes per condition) were carried out with D-[¹⁴C]glucose. Percentage of D-glucose uptake at various fructose concentration was compared with uptake in uncompeted oocytes (control). PvHT_ind (▪); PvHT_ind Q167N (▾); PvHT_sal (○).