Cover: Clinical anophthalmia in neural crest-specific Pitx2 knockout mice (right) at embryonic day 16.5, compared with eye position in wild type control littermate (left). This defect arises due to the absence of an extrinsic signal(s) from the Pitx2-deficient neural crest. For further information see Evans and Gage, pages 3347–3359, in this issue.
[Table of Contents]