S El-Assal, C Alonso-Blanco, A J M Peeters, V Raz & M Koornneef Nature Genet. 29, 435–440 (2001).

By error, three corrections were not made to proofs of the manuscript during its preparation for the press.

The last sentence in the legend of Fig. 1 and the penultimate sentence of the sixth paragraph refer to (an) “untranscribed” region(s). They should refer, instead, to (an) “untranslated” region(s).

An asterisk, indicating a control protein to which anti-CRY2 antibody non-specifically binds, should have appeared in Fig. 4c. The corrected panel follows.