>tr|A0A1X3HY23|A0A1X3HY23_ECOLX Aspartate carbamoyltransferase regulatory chain OS=Escherichia coli M056 GN=pyrI MTHDNKLQVEAIKRGTVIDHIPAQIGFKLLSLFKLTETDQRITIGLNLPSGEMGRKDLIK IENTFLSEDQVDQLALYAPQATVNRIDNYEVVGKSRPSLPERIDNVLVCPNSNCISHAEP VSSSFAVRKRANDIALKCKYCEKEFSHNVVLAN