Identification of other proteins soon followed; Fused in Sarcoma (FUS) and TAR DNA-binding protein-43 (TDP-43), both linked to amyotrophic lateral sclerosis (ALS), α-Synuclein (αSyn) in Parkinson’s disease (PD), multiple systemic atrophy (MSA) and Lewy body dementia (LBD), and huntingtin protein in Huntington disease, among many others. This evidence concerns the gene HTT and juvenile Huntington disease.