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Molecular assay reagents intended to identify CAG repeats in the atropin 1 (ATN1) gene, located at chromosome 12p13.31, which provides instructions for making a protein called atropin 1. Normal alleles have from 6 to 35 CAG trinucleotide repeats. A variation from the expected number of normal CAG trinucleotide repeat copies may produce altered DNA and improper gene functioning, resulting in full mutation. Alleles with 43 to 93 CAG trinucleotide repeats have been associated with dentatorubral-pallidoluysian atrophy (dyssynergia cerebellaris progressiva).
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