Zebrafish appb expression. (A) Transverse section of 60 hpf embryo with in situ hybridization for appb showing expression of appb in the brain (arrowhead) and the retina (arrow). (B) Flat mount of an hsp70:ca-fgfr1 24 hpf embryo without heat shock (right) showing appb expression in the hindbrain, and a 24 hpf embryo expressing a constitutively active form of fgfr1 after a 1 hr heat shock (hs) at 10 hpf (left) showing increased levels of appb expression in the hindbrain and sensory ganglia.

Acknowledgments
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