Interaction of the C9orf72-Amyotrophic Lateral Sclerosis-Related Proline–Arginine Dipeptide Repeat Protein with the RNA-Binding Protein NOVA1 Causes Decreased Expression of UNC13A Due to Enhanced Inclusion of Cryptic Exons, Which Is Reversed by Betulin Treatment. The gene discussed is UNC13A; the disease is lateral sclerosis.