1.Previous
3.Next

expressed in similar patterns between hemichordates and urochordates. In vertebrates, Pax 1 and Pax 9 are expressed in the pharyngeal pouches and are important for thymus development. Applying excess retinoic acid (excess retinoic acid in vertebrates results in pharyngeal abnormalities) leads to the absence of gill slits in developing amphioxi, suggesting that retinoic acid may act through the same mechanism in vertebrates and amphioxi.

1.Previous
3.Next