Kim et al., 2000 - Repressor activity of Headless/Tcf3 is essential for vertebrate head formation. Nature   407(6806):913-916 Full text @ Nature

Fig. 1 ZFIN is incorporating published figure images and captions as part of an ongoing project. Figures from some publications have not yet been curated, or are not available for display because of copyright restrictions.

Full text @ Nature