Nature 513, 110–114 (2014); doi:10.1038/nature13441

corrigendum Nature 519, 118 (2015); doi:10.1038/nature14149

In Extended Data Fig. 1b of this Letter, the photomicrographic images of the hepatoblast cells grown under normal conditions were mismatched. The figure shows control images indicating that cells expressing mutant IDH1 (R132C and R132H) or mutant IDH2 (R140Q and R172K) have similar morphology to those expressing wild-type (WT) IDH1 or IDH2 or empty vector (EV). The errors in the figure were: in the top row, the EV and R132C panels were swapped and in the bottom row, the panel for R172K was replaced by a duplicate image of the IDH2 WT panel. The Supplementary Information for this Corrigendum contains the corrected Extended Data Fig. 1b, and the original source files from which the corrected figure was assembled. Our conclusions are unaffected.