>tr|A0A2X2H3S5|A0A2X2H3S5_9GAMM Aspartate carbamoyltransferase regulatory chain OS=Serratia quinivorans GN=pyrI MTHDNKLQVEAIKCGTVIDHIPAQIGFKLLTLFKLTATDQRITIGLNLPSGELGRKDLIK IENTFLTEQQANQLAMYAPKATVNRIDNYEVVRKLTLSLPDHIDGVLTCPNSNCISRSEP VSSSFSVKSRDGDVHLKCRYCEKEFEHQVVLQAD