in the perfused tubules the transepithelial net secretory flux and in nonperfused tubules the tea cellular uptake were saturable ( km = 67 microm , vmax = 2,480 fmol x min-1 x mm-1 in perfused s2 segments ) , energy dependent , and inhibited by mepiperphenidol .
C1327616
secretory
C0007634
cellular