FIG. 4.
Summary of l-FMAU metabolism in the cells. ES, equilibrative-sensitive nucleoside transport system; EI, equilibrative-insensitive nucleoside transport system; NB, nucleobase transport system; Passive Diff., passive diffusion system; DP, DNA polymerase. Arrows with solid line indicate the reactions that are confirmed, while arrows with dashed lines indicate the reactions that are unconfirmed.