Fig. 2

The scheme of the entire threonine bypass from PEP. Two molecules of AcCoA were produced from PEP by CO₂ fixation at the expense of reducing power and energy. The numbers indicate the relative fluxes to PEP input. The metabolites are: PEP phosphoenolpyruvate, Pyr pyruvate, OAA oxaloacetate, Asp aspartate, A4P aspartyl-4-phosphate, ASA aspartate semialdehyde, Hse homoserine, PHS homoserine phosphate, threonine, AKB 2-amino-3-ketobutyrate, Gly glycine, Ser serine, Thr MTHF methylene-tetrahydropteroylpolyglutamates, Glu glutamate, 2-OXO 2-oxoglutarate