SOD1 and myocardial ischemia: Combination of PEP-1-SOD1 and PEP-1-CAT fusion proteins can more efficiently protect against ischemia-reperfusion-induced myocardial injury than PEP-1-SOD1 or PEP-1-CAT alone, which provides a basis for using PEP-1-SOD1 and PEP-1-CAT together to prevent myocardial ischemia-reperfusion injury.