The Functional Roles of the His247 and His281 Residues in Folate and Proton Translocation Mediated by the Human Proton-coupled Folate Transporter SLC46A1

E. S Unal, R Zhao, M. H Chang, A Fiser, M. F Romero and I. D. Goldman

The Journal of Biological Chemistry 284 ( 26 ): 17846 - 17857 , 2009