Fig. 7.

Unidirectional fluxes [aqueous humor-to-blood (AH-to-B); blood-to-aqueous humor (B-to-AH)] and net active flux of estrone-3-sulfate or cidofovir across the bovine ciliary body in Ussing chambers. The flux values were obtained at t = 2 hours and are the mean ± S.E. of the mean of four (estrone-3-sulfate) or three (cidofovir) separate experiments. The unlabeled concentration of estrone-3-sulfate and cidofovir was 5 μM. The net flux is the difference between the unidirectional fluxes. *P < 0.05, significantly different from the AH-to-B flux, two-tailed unpaired Student’s t test.