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Molecular assay reagents intended to identify deletions or duplications of the troponin I3, cardiac type (TNNI3) gene, located at chromosome 19q13.42, which encodes the protein troponin I, cardiac muscle. Genetic variants at this locus have been associated with dilated cardiomyopathy, familial restrictive cardiomyopathy, and familial hypertrophic cardiomyopathy.
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