Nature Reviews Microbiology 9, 397 (2011); doi:10.1038/nrmicro2584

In this Research highlight, our statement that this article revealed that “CALK phosphorylation ... is the first example of flagellar length being linked to a post-translational modification” was vague and possibly misleading. What we intended to convey was that this article revealed the first example of absolute flagellar length directly promoting changes in a post-translational modification; the role of post-translational modifications in the regulation of flagella has been described previously in many publications. The text now reads: “CALK phosphorylation ... is the first example showing that absolute flagellar length may be translated into a post-translational modification”. We apologize for any potential confusion.