Wikipedia
Neurogenins
Neurogenins are a family of bHLH transcription factors involved in specifying neuronal differentiation. They are related to Drosophila atonal.
The neurogenins (ngns) make up one of these atonal-related gene families. In neural crest cells, the atonal-related neurogenin family is particularly important for the sensory lineage (neurogenins are essential for the formation of dorsal root ganglia), while the achaete-scute homologue ash1 (Mash1) is important for aspects of autonomic neurogenesis (Mash1 is essential for noradrenergic differentiation).