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Human TPM2 wild-type allele is located in the vicinity of 9p13 and is approximately 9 kb in length. This allele, which encodes tropomyosin beta chain protein, is involved in muscle contraction. Mutation of the gene is associated with nemaline myopathy type 4, cap myopathy type 2 and distal arthrogryposis types 1A and 2B.
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