>sp|A1VE71|EX7S_NITV4 Exodeoxyribonuclease 7 small subunit OS=Nitratidesulfovibrio vulgaris GN=xseB MAGRKKAADFEQQLARLQEIVDALEGGDLPLEKSVALYKEGLGLARASREQLAKARNEIR LFTEGEVRDFDPEEGDDGDDR