[1] SNAT4 isoform of system A amino acid transporter is expressed in human placenta.Am J Physiol Cell Physiol. 2006 Jan;290(1):C305-12.
[2] The SNAT4 isoform of the system A amino acid transporter is functional in human placental microvillous plasma membrane.J Physiol. 2009 Jan 15;587(1):61-72.