Na(+)/H(+) antiporter 383 napA MEFIGILCLILVATTIGSHISRRFGIPAVIGQLLVGVLLGQAGLGWVHPNILVHDFSEIGVILLMFLAGLESDLSLLKKYFKPGMFVALLGILFPVFFGWLTGEAFQVANNEAIFFGIILAATSVSISVEVLKELNVVNTKEGSTILGASVVDDILVVLVLSFSLSFLTGKSTSNLPLPLLLLEQLFYFLFIFLLVKWIAPFLMSLAEKIYANSAIIIMSLVICLGMSYLADLIGLSSVIGAFFAGIAVSQTKVKHEVYNNVEALGYAVFIPVFFVSVGLEVDFSKFSEQILFILILTLVAILTKLIGGYIGAKFSSFSSNSALMVGAGMISRGEMALIILQIGQQSNLIENHYYSPLVIVVLLSTLISPLILKYFTKKVYAN NAPA_ENTHR This is a Na(+)/H(+) antiporter. It can mediate sodium uptake when a transmembrane pH gradient is applied.