It seems that concentration gradients of morphogens outside a cell ... cascade—the first step of which is the cell "seeing" the morphogen by binding to it on the surface, and the final step ...

Retinoic acid (RA) is one of several molecules that pattern vertebrate embryos by forming an anterior to posterior (A–P) concentration gradient. The issue of whether RA is a classical morphogen ...

Morphogens are produced at specific locations in growing organs and spread through tissues, forming gradients of concentration. Depending on the morphogen concentration, cells take on different ...

Researchers have created a way to guide and control the development of stem cells into specific tissues and organs, opening ...