>tr|F4TNJ5|F4TNJ5_ECOLX Aspartate carbamoyltransferase regulatory chain OS=Escherichia coli M718 GN=pyrI MTHDNKLQVEAIKRGTVIDHIPAQIGFKLLSLFKLTETDQRITIGLNLPSGEMGRKDLIK IENTFLSEDQVDQLALYAPQATVNRIDNYEVVGKSRPSLPERIDNVLVCPNSNCISHAEP VSSSFAVRKRANDIALKCKYCEKEFSHNVVLAN