May regulate MCM3AP phosphorylation through phosphatase recruitment (By similarity). May act as a negative regulator of ABCB1 expression and function through the dephosphorylation of ABCB1 by TFPI2/PPP2R3C complex (PubMed:24333728). May play a role in the activation-induced cell death of B-cells (By similarity). . This is the function of Ensembl gene identifier ENSG00000092020 (PPP2R3C, protein phosphatase 2 regulatory subunit B''gamma).