Fig. 4
Fig. 4 eya1 is specifically required for the transcriptional activation of pit1 and six1. All panels show whole-mount in situ hybridizations of eya1 mutants (lower panels) and wild-type siblings (upper panels) with probes indicated in upper right corners and at stages indicated in lower right corners of lower panels. (A, D) Lateral views, anterior to the left, dorsal to the top; (B, C, E-I) ventral views, anterior to the left. Arrowhead in panel A points to anterior regions of the adenohypophyseal placode, arrow to posterior lateral regions, which most likely give rise to somatotropes and thyrotropes. Arrows in panel D point to the adenohypophyseal cells, some of which are located within the oral cavity of mutant. Scale bars are 50 μm.
Reprinted from Developmental Biology, 292(1), Nica, G., Herzog, W., Sonntag, C., Nowak, M., Schwarz, H., Zapata, A.G., Hammerschmidt, M., Eya1 is required for lineage-specific differentiation, but not for cell survival in the zebrafish adenohypophysis, 189-204, Copyright (2006) with permission from Elsevier. Full text @ Dev. Biol.