>tr|D6ZV68|D6ZV68_BIFLJ 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase OS=Bifidobacterium longum subsp. longum GN=hisA MSLTLLPAVDVRDGKAVRLRQGESGSETDYGSPFEAARTWVEAGAEWIHLVDLDAAFGTG NNRDQLREIVHELGDRVNIELSGGVRDDASLDAALEAGAARVNIGTAALENPDWTASVIK KYGDRVAVGLDVRGHTLAARGWTREGGDLFETMKFLDSVGCSRYVVTDVAKDGMMSGPNI QLLREVAERTDAKVTASGGISKLDDLRAIKELAEIGVDSAILGKSLYARAFTLQEALAVA K