-REACTIONS reac1 : 1.0 A_ext -> 1.0 A reac2 : 1.0 A -> 1.0 B reac3 : 1.0 A -> 1.0 C reac4 : 1.0 B + 1.0 C -> 1.0 D reac5 : 1.0 D -> 1.0 D_ext reac6 : 1.0 E_ext -> 1.0 E reac7 : 1.0 E -> 1.0 D -CONSTRAINTS reac1 [0, 0] reac6 [0, 3] -EXTERNAL METABOLITES A_ext D_ext E_ext -OBJ reac5 1 1 -DESIGNOBJ reac5 1 1