>sp|O57719|TRKA_PYRHO Trk system potassium uptake protein TrkA homolog OS=Pyrococcus horikoshii GN=trkA MYIVIMGAGRIGTLVARMLESEGHDVAIIEMNRERAREISEYISGLVIEGDATDQKVLEN ANIKNANAFAALTGKDDANILACILAKHLNPNIMTILRITDPGKKKIFEDVKELKTYFDI VVSPEDIAANYIFRTLVTPGFNRVLLPREGAEIIQFQIDEDCEVAGKPVKELNLPKDSLI IAVYDEKGNLTIPSGDTIIPKKGQVIIFAKNSALQEVKKIMEKKKKEQ