NCIt definition : Human PPP2R2B wild-type allele is located in the vicinity of 5q32 and is approximately
504 kb in length. This allele, which encodes serine/threonine-protein phosphatase
2A 55 kDa regulatory subunit B beta isoform protein, is involved in the regulation
of protein phosphatase activity. Expansion of a CAG trinucleotide repeat sequence
in the 5' UTR of the gene from 7-28 copies to 55-78 copies is associated with autosomal
dominant spinocerebellar ataxia 12.;