Molecular embryology of the lung: then, now, and in the future.

Presents information on a study which examined the molecular embryology of the lung. Genetics of tracheal branching morphogenesis in Drosophila; Pattern formation in the anterior foregut and the morphogenetic function of NKX2.1, a thyroid transcription factor-1; How transcription factors interact in regulatory networks to determine lung epithelial cell fate; Integration of signaling systems in lung morphogenesis.