A non-sense mutation is a mutation that results in a pre-mature stop codon.  The premature stop codon results in a tuncated version of a protein, rendering it inefficient or useless.  There are several diseases associated with non-sense mutations, including; cystic fibrosis and beta-thalassaemia.

Example of a Nonsense mutation. Complements of the NIH genetic home reference.



NIH Genetic Home Reference: Non-Sense Mutation

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