Purine permease implicated in ATP-dependent cytokinin translocation that controls the spatiotemporal landscape of cytokinin signaling. Depletes ligands from the apoplast, which leads to a suppression of the cytokinin response. Expressed in seedlings, leaves, embryos, ovules, seeds and the root and shoot meristems. In heart-stage embryos, detected in cells that failed to respond to cytokinins, including the prospective cotyledons. Belongs to the purine permeases (TC 2.A.7.14) family.