Nature 465, 891–896 (2010)

In this Article, the following studies, which led to the identification of diphthamide structure and its biosynthetic genes, should have been cited1,2,3,4,5. Reference 1 reports the presence of an unusual amino acid at the ADP-ribosylation site of elongation factor 2 (EF2); ref. 2 reports the properties of the modified residue in EF2 and proposed the name diphthamide; ref. 3 reports the structure of diphthamide; ref. 4 describes work to suggest that the 3-amino-3-carboxypropyl group of diphthamide come from S-adenosyl methionine; and ref. 5 reports the identification of yeast mutants that are defective in diphthamide biosynthesis and proposes the biosynthetic pathway.