The frequency is followed by ATXN7: 6.09%, TBP: 5.59%, ATXN2: 5.03%, CACNA1A: 4.28%, PPP2R2B: 2.68%, and ATXN3: 2.42% with respective cutoff values in uncharacterized ataxia cases. The gene discussed is PPP2R2B; the disease is cerebellar ataxia.