In the article “Rapid, Activation-Induced Redistribution of Ionotropic Glutamate Receptors in Cultured Hippocampal Neurons,” by Dmitri V. Lissin, Reed C. Carroll, Roger A. Nicoll, Robert C. Malenka, and Mark von Zastrow, which appeared on pages 1263–1272 of the February 15, 1999 issue, the right panel of Figure 5B (page 1268) was incorrect. The figure is reprinted.