The ePress version of this article published on 30 November 2005 contains an error.
UAS-myc-EGFPF should read UAS-nls-myc-EGFP on pages 118 and 119.
Both the published print on final online versions of the article are correct.
The authors apologise to readers for this mistake.
Development133, 117-127.
© 2006.
2006