Sci. STKE, 16 December 2003
Figure 1 from the Perspective by I. Stagljar had parts B and C reversed in the image and the figure legend. A corrected figure has been created and the legend has been corrected. As of December 18, 2003, the online display has been corrected and a corrected PDF is available.
The original, uncorrected PDF can be accessed from http://stke.sciencemag.org/cgi/data/sigtrans;2003/213/pe56/DC1/1.
Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882