cytochrome vs hemoprotein

cytochrome and hemoprotein both are nouns.

Word	Noun	Adjective	Verb	Adverb
cytochrome	Yes	No	No	No
hemoprotein	Yes	No	No	No

As nouns, hemoprotein is a hypernym of cytochrome; that is, hemoprotein is a word with a broader meaning than cytochrome:

cytochrome: (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration)
hemoprotein: a conjugated protein linked to a compound of iron and porphyrin

Other hypernyms of cytochrome include haemoprotein.

cytochrome (noun)	hemoprotein (noun)
(biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration)	a conjugated protein linked to a compound of iron and porphyrin