Function
The B regulatory subunit might modulate substrate selectivity and catalytic activity, and also might direct the localization of the catalytic enzyme to a particular subcellular compartment. Interacts with retinoblastoma-related protein p107 (in vivo). May target PP2A core dimer to p107 resulting in dephosphorylation of p107.
Sequence
MPERPPIRALRRDPDDPAVAQALASLARGSDLVFPSRFQKWLRDFRQVHAHRKEEPPPQSPPPGHTVPAFYFPCGRPPPRPQDTEDAIALVECAFEGLPRGRAGLGDMAVVAKACGCPLYWKAPLFYAAGGERTGSVSVHMFVAMWRKVLLTCHDDAARFVRLLGHPGCSGLIQEDFVPFLQDVVNSHPGLAFLRAAKDFHSRYITTVIQRIFYTVNRSWSGMISREELRRSSFLQAVSQLEVEPDINRMTSFFSYEHFYVIYCKFWELDLDRDLTIDRSDLARHGDGAISSRMIDRIFSGAVTRARLPRKVGKLSYADFVWFLLSEEDKTTPTSTEYWFRCMDLDGDGALSMFELEFFYEEQAQRMAARGVEPLPFHDLARQVLDLVAPRCPGRITLRDLKQCGLAGEFFDAFFNVDKYLAREQREQAGTPQDTDSDPAASAWDRYAAEEYDFLVAEEAMAEDDDDHDEGSDPIDLYGLADEDCDDLEPL