In the cases of dilated cardiomyopathy, cardiac muscle contraction, and hypertrophic cardiomyopathy (B), seven downregulated proteins were enriched, including Myl2, Myl3, Myh7, Atp2a1, Tpm1, Tpm2, and Ttn (Figure 10). This evidence concerns the gene MYL2 and hypertrophic cardiomyopathy.