The fluorouridine insensitive 1 (fur1) mutant is defective in equilibrative nucleoside transporter 3 (ENT3), and thus represents an important pyrimidine nucleoside uptake system in Arabidopsis thaliana.
Traub M, Flörchinger M, Piecuch J, Kunz HH, Weise-Steinmetz A, Deitmer JW, Ekkehard Neuhaus H, Möhlmann T. Plant J. 2007 Mar; 49(5):855-64. Epub 2007 Jan 23.