Table 1

Epithelial–mesenchymal circuits in limb outgrowth and lung morphogenesis

SiteTranscriptional localization
EpitheliumMesenchyme
Limb outgrowthFgfr2-IIIbFgf10
Fgf8 and 4Fgfr2-IIIc
Lung morphogenesisFgfr2-IIIbFgf10
Fgf9Fgfr2-IIIc