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Development (2001) 128 (18): 3485–3495.
Published: 15 September 2001
... differently. Unlike other vertebrates, zebrafish express three hh genes in the embryonic midline: shh , echidna hedgehog ( ehh ) and tiggywinkle hedgehog ( twhh ) . Therefore, it is possible that Twhh and Ehh are sufficient for motoneuron formation in the absence of Shh. To test this hypothesis we have...