Fig. 7

Scheme for formation of stable PHD2.Fe(III).2OG.(+/– HIFα) complexes. Note that the stoichiometries (and in some cases products) of the outlined mechanisms are uncertain. L-Asc hinders formation of the PHD2.Fe(III).2OG.(+/– HIFα) complexes and can restore them to the catalytically active PHD2.Fe(II).2OG complexes. SIN: succinate, L-Asc: L-ascorbate, DHA: dehydroascorbic acid.