Ambiguous gene Associated reaction Multigene complex?* Comment BP0035 Rxn02160 L-Histidinol-phosphate phosphohydrolase No BP0103 Rxn00849 D-Alanine2-oxoglutarate aminotransferase BP0769 or BP0103 associated with this rxn BP0492 BP2051 BP3608 BP3639 Rxn13782 Protein biosynthesis Yes BP0841 Rxn10122 NADH dehydrogenase (ubiquinone-8 3.5 protons) Yes BP1126 rxn01241 DihydrolipoamideNAD+ oxidoreductase BP1729 or BP0618 or BP0995 or BP1126 associated with this rxn BP1264 rxn13783 DNA replication Yes BP3151 rxn08040 UDP-N-acetylglucosamineundecaprenylphosphate N-acetylglucosamine -1-phosphate transferase Blocked reaction BP3773 rxn03175 N-(5'-phospho-D-ribosylformimino)-5-amino-1- (5''-phospho-D-ribosyl)-4-imidazolecarboxamide ketol-isomerase Supplemental Table S4. Ambiguously essential genes that appear in the model. *The gene product is comprises part of a multi-protein complex/pathway that involves other essential genes.