In the article “Kinetics of Exocytosis Is Faster in Cones Than in Rods,” by Katalin Rabl, Lucia Cadetti, and Wallace B. Thoreson, which appeared on pages 4633-4640 of the May 4, 2005 issue, the concentration of EGTA given in the fourth paragraph of Materials and Methods is incorrect. The correct concentration is 5 mm.
