Cell Biology. In the article “Identification of a c-fos-induced gene that is related to platelet-derived growth factor/vascular endothelial growth factor family” by Maurizio Orlandini, Lucia Marconcini, Rebecca Ferruzzi, and Salvatore Oliviero, which appeared in number 21, October 15, 1996, of Proc. Natl. Acad. Sci. USA (93, 11675–11680), the following correction should be noted. The authors wish to point out that the accession number in their article is incorrectly stated as U99572U99572. The correct number is X99572X99572.