The following correction should be noted for the Review "Organization and Functions of Interacting Domains for Signaling by Protein-Protein Interactions" by Buck and Iyengar. On page 2, paragraph 2 of the PDF, PKR was described as activated by double-stranded DNA. That is incorrect. PKR is activated by double-stranded RNA.

This sentence should read

PKR, which is activated by double-stranded RNA (11), is also thought to be involved in apoptosis (10, 12).

The corrected online version of the full text and a corrected PDF are available starting 25 May 2004.

A PDF of the review as originally published is also available;2003/209/re14/DC3/1.