simple protein vs actin

simple protein and actin both are nouns.

Word	Noun	Adjective	Verb	Adverb
simple protein	Yes	No	No	No
actin	Yes	No	No	No

As nouns, actin is a hyponym of simple protein; that is, actin is a word with a more specific, narrower meaning than simple protein:

simple protein: a protein that yields only amino acids when hydrolyzed
actin: one of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form

simple protein (noun)	actin (noun)
a protein that yields only amino acids when hydrolyzed	one of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form