purine permease-related. similar to ATPUP18 (Arabidopsis thaliana purine permease 18), purine transmembrane transporter [Arabidopsis thaliana] (TAIR:AT1G57990.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN73056.1); contains InterPro domain Protein of unknown function DUF250 (InterPro:IPR004853)