preferred_name: apo-[cytochrome c] + heme b => holo-[cytochrome c]
preferred_name_lc: apo-[cytochrome c] + heme b => holo-[cytochrome c]
label: apo-[cytochrome c] + heme b => holo-[cytochrome c]
label_lc: apo-[cytochrome c] + heme b => holo-[cytochrome c]