Major facilitator superfamily protein;(source:Araport11)
TAIR Curator Summary:
Tonoplast localized pH dependent, low affinity nitrogen transporter.In shoots, expressed in leaf veins and mesophyll. In roots, GUS activity was detected in root vascular stele. More highly expressed in roots.
At1g22550 (NPF5.16) is involved in the nitrate from vacuoles into cytosol, thus serving as important player to modulate nitrate allocation between roots and shoots.