In the article “Regulation of Spine Development by Semaphorin3A through Cyclin-Dependent Kinase 5 Phosphorylation of Collapsin Response Mediator Protein 1” by Naoya Yamashita, Asa Morita, Yutaka Uchida, Fumio Nakamura, Hiroshi Usui, Toshio Ohshima, Masahiko Taniguchi, JérÔme Honnorat, Nicole Thomasset, Kohtaro Takei, Takuya Takahashi, Pappachan Kolattukudy, and Yoshio Goshima, which appeared on pages 12546–12554 of the November 14, 2007 issue, Figure 1 contained photomicrographs that were previously published in Figure 7 of the article “Regulation of Dendritic Branching and Spine Maturation by Semaphorin3A-Fyn Signaling” by Asa Morita, Naoya Yamashita, Yukio Sasaki, Yutaka Uchida, Oumi Nakajima, Fumio Nakamura, Takeshi Yagi, Masahiko Taniguchi, Hiroshi Usui, Ritsuko Katoh-Semba, Kohtaro Takei, and Yoshio Goshima, which appeared on pages 2971–2980 of the March 15, 2006 issue. The authors acknowledge that portions of this figure were duplicated without copyright permission or proper acknowledgement required by the Guidelines for Responsible Conduct Regarding Scientific Communication of the Society for Neuroscience.