This book comprehensively reviews the proteins associated with neurodevelopmental disorders, including Autism Spectrum Disorder (ASD), and Attention Deficit Hyperactivity Disorder (ADHD). It also discusses the interactions of the associated-proteins, like Bromodomain-containing proteins (BCPs), synaptic proteins, scaffolding proteins, transcriptional factors, and DNA-binding proteins at the subcellular and molecular levels. The book also explores the potential of these proteins as a druggable target and a biomarker in the neurodevelopmental disorders. The book further explores the recent advancements in understanding the important role of epigenetic factors in predisposition to these diseases. Lastly, it presents genetic factors that lead to variation in gene expression in these diseases.