Vol. 166, No. 1, July 5, 2004. Pages 73–83.

The reference Wu et al., 2003, was incorrectly included in the paper. The correct reference (Wu-Baer et al., 2003) appears below.

Wu-Baer, F., K. Lagrazon, W. Yuan, and R. Baer.
2003
. The BRCA1/BARD1 heterodimer assembles polyubiquitin chains through an unconventional linkage involving lysine residue K6 of ubiquitin.
J. Biol. Chem
. 278:
34743
–34746.