(center map)
(1) HIF1A+O_sub_2_endsub_+2-oxoglutarate - succinate - fumarate - Fe_super_2+_endsuper_:PHD* - OS9 -> HIF1A|P564_hyd+succinate+CO_sub_2_endsub_
(2) Fe_super_2+_endsuper_:PHD*+ROS -> Fe_super_3+_endsuper_:PHD*
(3) Fe_super_3+_endsuper_:PHD*+L-ascorbate -> Fe_super_2+_endsuper_:PHD*
(4) PHD* -> Fe_super_2+_endsuper_:PHD*