Where is the mutation that causes hypertrophic cardiomyopathy typically located?

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Multiple Choice

Where is the mutation that causes hypertrophic cardiomyopathy typically located?

Mutations in hypertrophic cardiomyopathy are located in genes that encode sarcomere proteins—the core components of the heart’s contractile unit. Alterations in these sarcomeric genes (for example, MYH7 and MYBPC3) disrupt normal cross-bridge cycling and force generation, triggering compensatory hypertrophy, myocyte disarray, and fibrosis that characterizes the disease. This is why the mutation sits in sarcomere protein genes rather than in mitochondrial DNA, ion channel genes, or extracellular matrix proteins, which underlie different cardiac conditions.

Mutations in hypertrophic cardiomyopathy are located in genes that encode sarcomere proteins—the core components of the heart’s contractile unit. Alterations in these sarcomeric genes (for example, MYH7 and MYBPC3) disrupt normal cross-bridge cycling and force generation, triggering compensatory hypertrophy, myocyte disarray, and fibrosis that characterizes the disease. This is why the mutation sits in sarcomere protein genes rather than in mitochondrial DNA, ion channel genes, or extracellular matrix proteins, which underlie different cardiac conditions.

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