Nat. Biotechnol. 23, 995–1001 (2005)

On page 1,000, in the last Methods section, line 4 from bottom of page, “HeLa cells were treated with 100 mM Deferoxamine Mesylate” should have read “HeLa cells were treated with 100 μM Deferoxamine Mesylate.”

In the supplementary online information, the original Supplementary Table 3 erroneously showed the Biopred algorithm scores (predicted relative activity) in the last column, instead of experimentally determined 'Normalized inhibitory activity'. This has been corrected in the new Supplementary Table 3 and the appropriate footnotes added. The changes affect all of the 3,000 values listed in the last column of the table.