SERINE/THREONINE PROTEIN PHOSPHATASE 2A, 56 KDA REGULATORY SUBUNIT, ALPHA ISOFORM (PP2A, B SUBUNIT, B ALPHA ISOFORM) (PP2A, B SUBUNIT, B56 ALPHA ISOFORM) (PP2A, B SUBUNIT, PR61 ALPHA ISOFORM) (PP2A, B SUBUNIT, R5 ALPHA ISOFORM). [Source:SWISSPROT;Acc:Q15172]