DPc10 is a bioactive peptide. [It represents the amino acid segment 2460 to 2495 of the cardiac ryanodine receptor (RyR2). RyR2 is responsible for regulating calcium release from the sarcoplasmic reticulum, which initiates muscle contraction. Mutations in RyR2 are associated with ventricular tachycardia (VT) and sudden death.]