Teashirt is required for transcriptional repression mediated by high Wingless levels.


During development, extracellular signals often act at multiple thresholds to specify distinct transcriptional and cellular responses. For example, in the embryonic midgut of Drosophila, low Wingless levels stimulate the transcription of homeotic genes whereas high Wingless levels repress these genes. Wingless- mediated transcriptional activation is… (More)


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