All of the following diseases are due to excessive number of glutamine residues in proteins, EXCEPT: (A) Huntington's chorea, (B) Spinocerebellar ataxia, (C) Myotonic dystrophy, (D) Spinobulbar muscular atrophy
Answer is C. CAG codes for glutamine Poly Q disorders Those diseases which are due to CAG repeat Eg : Spinobulbar muscular atrophy (Kennedy disease), Spinocerebellar ataxia Huntington's disease Myotonic dystrophy is due to | CTG repeat, not CAG.