ApoE KO mice were treated with Mas receptor agonist AVE 0991 fo 16 weeks. At the age of 6 months mice were killed, the kidneys were dissected and the mitochondria were isolated by differential centrifugation. Next, 2DE electrophoresis was conduced. Healthy control (C57BL/6J mice), apoE KO and apoE KO treated with AVE 0991 were compared. Gel pieces containing protein spots of interest were destained, reduced, alkylated, digested with modified trypsin and analysed by LC-MS/MS method.