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JOURNAL ARTICLES
Expression of zebrafish nk2.2 is influenced by sonic hedgehog/vertebrate hedgehog-1 and demarcates a zone of neuronal differentiation in the embryonic forebrain
K.A. Barth, S.W. Wilson
Development 1995 121: 1755-1768;
K.A. Barth
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S.W. Wilson
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Summary

We have isolated zebrafish nk2.2, a member of the Nk-2 family of homeobox genes. nk2.2 is expressed in a continuous narrow band of cells along a boundary zone demarcating the location at which two of the earliest nuclei in the brain differentiate. This band of cells is located within a few cell diameters of cells expressing the signalling molecule sonic hedgehog/vertebrate hedgehog-1 (shh/vhh-1). Injection of shh/vhh-1 RNA results in ectopic expression of nk2.2 and concomitant abnormalities in the forebrain and eyes. Moreover, cyclops mutant embryos, which initially lack neurectodermal expression of shh/vhh-1, show a concomitant lack of nk2.2 expression. Together, these results suggest a requirement of shh/vhh-1 protein for the spatial regulation of nk2.2 expression.

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JOURNAL ARTICLES
Expression of zebrafish nk2.2 is influenced by sonic hedgehog/vertebrate hedgehog-1 and demarcates a zone of neuronal differentiation in the embryonic forebrain
K.A. Barth, S.W. Wilson
Development 1995 121: 1755-1768;
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JOURNAL ARTICLES
Expression of zebrafish nk2.2 is influenced by sonic hedgehog/vertebrate hedgehog-1 and demarcates a zone of neuronal differentiation in the embryonic forebrain
K.A. Barth, S.W. Wilson
Development 1995 121: 1755-1768;

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