These include genes for collapsin response mediator protein 4 (CRMP4), a highly expressed protein in the adult nervous system regulating axonal guidance [79], FER, a cytoplasmic protein tyrosine kinase regulating microtubules [80], and CLIP1, a microtubule protein in vesicular trafficking and associated with intellectual disability [81]. The gene discussed is DPYSL3; the disease is Intellectual disability.