>sp|P57450|PYRB_BUCAI Aspartate carbamoyltransferase catalytic subunit OS=Buchnera aphidicola subsp. Acyrthosiphon pisum GN=pyrB MRNSLYKKNIISINDLQRNELELVLNKSAMLKKTPQPNLLKNKVIASCFFEASTRTRLSF ETAIYRLGASIVGFSDGNNISLEKKGETLTDTISVISSYVDAIIIRHPQEGSARLAAEFS NKKPIFNAGDGANQHPTQTLLDLFTIQETQNRLTQLNIAIVGDLKYGRTVHSLTQALAKF KHNKFYFISPDALKMPNYINNMLDKKEIYWKRHNNIEEIISEIDILYMTRIQKERLDSTE YANAKSKFVLRAAILKNARNNMKILHPLPRIDEIDRDVDYTPYAWYFKQAANGIYARQAI LSLVLIEKHL