Figure 2 in the original manuscript contained two referential panels (B and C) that had been modified from a previous publication by the authors (Hum Mol Genet, 2001, 12:629–642). These panels were superfluous to the specific context of the data published in the manuscript and did not serve any purpose other than being illustrative of general methodology and were therefore redundant to the scientific substance of discovery being communicated in the publication. Panels C and D from the original publication, along with any textual reference to them in the Fig. 2 Legend, have thus been removed. The Fig. 2 (and modified Figure Legend) in the original communication should be replaced with those provided herein.