You are studying the uptake of L-leucine by epithelial cells of the mouse intestine. Measurements of the rates of uptake of L-leucine and severalof its analogs, with and without Na+ in the assay...

You are studying the uptake of L-leucine by epithelial cells of the mouse intestine. Measurements of the rates of uptake of L-leucine and several
of its analogs, with and without Na⁺
in the assay buffer, yield the results given in the table below. What can you conclude about the properties and mechanism of the leucine transporter? Would you expect L-leucine uptake to be inhibited by ouabain?

Extracted text: Uptake in presence of Na+ Uptake in absence of Na+ Substrate Vmax K+(mM) Vmax K†(mM) L-Leucine 420 0.24 23 0.2 D-Leucine 310 4.7 5 4.7 L-Valine 225 0.31 19 0.31