MHC-guided processing: binding of large antigen fragments

Nature Reviews Immunology 3, 621–629 (2003) In the legend to Figure 5 on page 627, the incorrect references are cited. The legend should state that the second pathway includes ideas from Refs 56 and 59. These references are as follows: 56. Lindner, R. & Unanue, E. R. Distinct antigen MHC class II complexes generated by separate processing pathways.