SCD and HCM share the following elements: sodium, calcium, RYR2 gene encoding RyR2, CaMKII, actin, MYL12A gene, myosin complex, TNNT1 gene encoding troponin T, troponin C, TNNI3 gene encoding troponin I, ATP, PKA, GJA1 gene encoding gap junction protein alpha 1 (connexin-43), PLN gene encoding phospholamban, GSTK1 gene encoding glutathione S-transferase kappa 1, which belongs to a superfamily of enzymes for cellular detoxification, and death. The gene discussed is GJA1; the disease is Schnyder corneal dystrophy.