Figure 5. All four NTT proteins of Trachipleistophora hominis transport purine nucleotides but not pyrimidine nucleotides.

Uptake of [α-32P]-labelled (A) nucleoside triphosphates or (B) nucleoside diphosphates into IPTG-induced E. coli cells containing a pET16b vector encoding the respective ThNTT genes or no insert (control). For all nine nucleotides the data are represented by the mean and standard error of two independent experiments.