Abstract Background Functional studies in model organisms. such as vertebrates and Drosophila. have shown that basic Helix-loop-Helix (bHLH) proteins have important roles in different steps of neurogenesis. from the acquisition of neural fate to the differentiation into specific neural cell types. https://www.lightemupsequences.com/quick-find-Our-Seasons-The-World-in-Winter-Spring-Summer-and-Autumn-best-save/