regulator gene vs regulatory gene

regulator gene and regulatory gene both are nouns.

Word	Noun	Adjective	Verb	Adverb
regulator gene	Yes	No	No	No
regulatory gene	Yes	No	No	No

As nouns, regulator gene and regulatory gene are synonyms defined as:

regulator gene and regulatory gene: a gene that produces a repressor substance that inhibits an operator gene

regulator gene (noun)	regulatory gene (noun)
a gene that produces a repressor substance that inhibits an operator gene	a gene that produces a repressor substance that inhibits an operator gene