Takahashi, H., Shintani, T., Sakuta, H. and Noda, M. Development130,5203-5215.

An error in this article was not corrected before going to press.

The legend to Fig. 3 should read `CBF1/RCAS-electroporated retinae' and not `CBF1/RCAS-electroporated reginae'.

We apologise to readers and the authors for this mistake.