Correction

PHYSIOLOGY. For the article “Conformational activation of Ca²⁺ entry by depolarization of skeletal myotubes,” by Gennady Cherednichenko, Alanna M. Hurne, James D. Fessenden, Eun Hui Lee, Paul D. Allen, Kurt G. Beam, and Isaac N. Pessah, which appeared in issue 44, November 2, 2004, of Proc. Natl. Acad. Sci. USA (101, 15793–15798; first published October 25, 2004; 10.1073/pnas.0403485101), it should have been noted that authors G.C. and A.M.H. contributed equally to the research and that A.M.H. helped design the research.