Meaning of PROTO-ONCOGENE

WordNet Dictionary
	Definition:		[n]  a normal gene that has the potential to become an oncogene
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	See Also:		factor, gene
Biology Dictionary
	Definition:		A normal gene that, when it's mutated or improperly expressed, can cause cancer to develop. A gene, usually one that codes for a regulatory protein, that can become an oncogene if it mutates.
Glossary
	Definition:		See oncogene