Annexes

Abstract

We have identi®ed a Xenopus bHLH gene, Xath2, which is the homologue of the murine MATH-2/NEX-1 gene, using a functional expression screening approach. Overexpression of this gene in neurula embryos induces the expression of the N-tubulin neuronal marker but does not stimulate the expression of the X-ngnr-1 and NeuroD proneural genes. Expression of Xath2 begins in stage 32 embryos and is restricted to the dorsal telencephalon. Within the neuroepithelium of the dorsal telencephalon, Xath2 expression is detected in postmitotic cells located more laterally than those expressing several other related bHLH neuronal regulators. q 2001 Elsevier Science Ireland Ltd. All rights reserved.