<prompt> All of the following diseases are due to excessive number of glutamine residues in proteins, EXCEPTHuntingtons choreaSpinocerebellar ataxiaMyotonic dystrophySpinobulbar muscular atrophy  <response>: CAG codes for glutamine Poly Q disorders Those diseases which are due to CAG repeat Eg : Spinobulbar muscular atrophy Kennedy disease, Spinocerebellar ataxia Huntingtons disease Myotonic dystrophy is due to CTG repeat, not CAG. 