Statement of Retraction. Gerolama Condorelli, Giovanni Vigliotta, Alessandra Trencia, Maria Alessandra Maitan, Matilde Caruso, Claudia Miele, Francesco Oriente, Stefania Santopietro, Pietro Formisano, and Francesco Beguinot. Protein Kinase C (PKC)-α Activation Inhibits PKC-ζ and Mediates the Action of PED/PEA-15 on Glucose Transport in the L6 Skeletal Muscle Cells. Diabetes 2001;50:1244-1252. DOI: 10.2337/diabetes.50.6.1244. PMID: 11375323