Neural crest specification: Migrating into genomics

The bones in your face, the pigment in your skin and the neural circuitry that controls your digestive tract have one thing in common: they are all derived from neural crest cells. The formation of these migratory multipotent cells poses an interesting developmental problem, as neural crest cells are not a distinct cell type until they migrate away from the central nervous system. What defines the pool of cells with neural crest potential, and why do only some of these cells become migratory? New genomic approaches in chick, zebrafish and Xenopus might hold the key.