>sp|P21903|ATP6_PROMO ATP synthase A chain, sodium ion specific (EC 3.6.3.15) (Protein 6) - Propionigenium modestum. MKKMGPIILAVVIAIGTFALKMMGVIGFKTPPLVEGPKIMFYVPLPEAMHDFPFAMEMASGVYGFPVTITVISTWFVMLF LIMVFRWSSKNLEVVPERKQAFFETIYGFLDDLYGQLLGNWKKKYFTYIGTLFLFLLISNIVSFFPIPGFSSENGVFSIA PALRTPTADLNTTVGLALLTTYSFIAASFRTSGFFGFFKGLFEPMPLMFPINLAGEFAKPTNISIRLFGNMFAGMVILGL LYKAAPVLIPAPLHLYFDLFSGVVQSFVFIMLTMVYIQGSIGDAEYLED