PHARMACOLOGY. For the article “Ligand-dependent interactions of coactivators steroid receptor coactivator-1 and peroxisome proliferator-activated receptor binding protein with nuclear hormone receptors can be imaged in live cells and are required for transcription” by Juan Llopis, Stefan Westin, Mercedes Ricote, Jiahong Wang, Charles Y. Cho, Riki Kurokawa, Tina-Marie Mullen, David W. Rose, Michael G. Rosenfeld, Roger Y. Tsien, and Christopher K. Glass, which appeared in number 8, April 11, 2000, of Proc. Natl. Acad. Sci. USA (97, 4363–4368), the authors note the following correction: Jiahong Wang should be spelled Zhiyong Wang.