>sp|Q8TXD2|NADK_METKA NAD kinase OS=Methanopyrus kandleri GN=nadK MFRPQVVGVTGRTDLGRAVRVAERVCRLCDREGFEVLVDDSLGIGEYPRVNLKDMGKEVD MIITIGGDGTILRVSRITSEYEVPILGVNLGKFGFLTEVSESGLKEAVSRLARGDFNLEE HRKLRIKIGGSDEGDALNEVTVITSRPAKMIRYRLSIDGFELETTWADGVLVATPTGSTA YSLSAGGPIVEPQVECSIITPLNPFKLEARPMVVSMDRRVEIDVDDPERAEVVVDGQEYM NLDGTVSVTRSPNVARFIRFGSTYFERLKEKFLRWD