CELL BIOLOGY. For the article “Untangling the wires: A strategy to trace functional interactions in signaling and gene networks,” by Boris N. Kholodenko, Anatoly Kiyatkin, Frank J. Bruggeman, Eduardo Sontag, Hans V. Westerhoff, and Jan B. Hoek, which appeared in number 20, October 1, 2002, of Proc. Natl. Acad. Sci. USA (99, 12841–12846; First Published September 19, 2002; 10.1073/pnas.192442699), the affiliation of the communicating member appeared incorrectly. The correct “Communicated by” line appears below.
Communicated by Rudolf E. Kalman, Swiss Federal Institute of Technology, Zurich, Switzerland, July 25, 2002 (received for review March 30, 2002)