AdiC belongs to the APC superfamily ofmembrane proteins 6,7,9, which transports amino acids, polyaminesand organic cations in a multitude of biological roles, includingdeliveryofargininefornitricoxidesynthesis 10,facilitationofinsulinrelease from pancreatic b-cells 11, and, when inappropriately over-expressed,provisioningofcertainfast-growingneoplasticcellswithamino acids