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Definition of Mutation, null

Mutation, null: A mutation (a change) in a gene that leads to its not being transcribed into RNA and/or translated into a functional protein product.

For example, a null mutation in a gene that usually encodes a specific enzyme leads to the production of a nonfunctional enzyme or no enzyme at all.

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Heart Disease: Causes of a Heart Attack See Slideshow
Reviewed on 12/11/2018
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