The publisher of Molecular Endocrinology retracts the following article due to significant concerns with the data: “Caveolin 1 Is Required for the Activation of Endothelial Nitric Oxide Synthase in Response to 17β-Estradiol,” by Neetu Sud, Dean A. Wiseman, and Stephen M. Black (Molecular Endocrinology 24:1637–1649, 2010; doi: 10.1210/me.2010-0043).