“Aminohippurate, penicillin and riboflavin inhibited the active accumulation of [14C] aminohippurate and [14C]penicillin by kidney slices.”
“These studies support the notions that: 1) riboflavin is accumulated in kidney cortex slices by an energy-dependent saturable transport … by kidney slices is inhibited by cyclic organic acids and sulfhydryl reagents, but not weak bases; and 3) riboflavin is … aminohippurate as well as an … accumulation by kidney slices.”