Anti-PP2A, B Subunit (PP2CB, protein phosphatase 1B , magnesium-dependent, beta isoform, PP2A-beta,

PP2A is a heterotrimeric type 2 Ser/Thr phosphatase, composed of a structural subunit (A), a regulatory subunit (B), and a catalytic subunit (C). The structural A and catalytic C subunits form the constitutive core of the enzyme, which associates with one of a large number of regulatory B subunits. There are multiple isotypes (encoded by distinct genes) of the B subunit, grouped into three families: B/PR55, B'/PR61, and B''/PR72 . The prototypical B (or PR55) family of subunits is encoded by three genes, Balpha, Bbeta and Bgamma . The B' (or B56) family consists of at least seven splice variants derived from five genes. RNA's for the two members of the B'' family, PR72 and PR130, arise by alternative splicing or use of alternate transcription start sites from the same gene. Primary structures as well as functions of B and B' subunits are conserved from yeast to mammals. PTPA is a member of the B' family that is required for activation of PP2A by an undefined mechanism. PP2A is distinguishable from PP2B/Calcineurin and PP2C by its partial activity in the absence of divalent cations, and its high sensitivity to Okadaic Acid. It is also thought to be the principal downmodulator of Ser/Thr kinase cascades. Applications: Suitable for use in Western Blot and Immunohistochemistry. Other applications not tested. Recommended Dilution: Western Blot: 1:500, Immunohistochemistry (paraffin): 1:100, Optimal dilutions to be determined by the researcher. Positive Control: NIH/3T3 Cell Lysate, Storage and Stability: May be stored at 4°C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot and store at -20°C. Aliquots are stable for at least 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.