Inhibitor 2 of protein phosphatase 2A

The designation "Inhibitor 2 of protein phosphatase 2A" appears to refer to an inhibitory protein that regulates PP2A activity, rather than a target molecule itself. The provided search results do not contain specific information about a protein formally designated as "Inhibitor 2 of protein phosphatase 2A." While Protein Phosphatase 2A (PP2A) is a serine/threonine phosphatase composed of a scaffolding A subunit, a catalytic C subunit, and regulatory B subunits[2][3], and is known to be regulated by various mechanisms including post-translational modifications and endogenous inhibitory proteins like FAM122A[8], no specific protein called "Inhibitor 2" was found in the search results. This component is considered an endogenous regulatory protein, not a therapeutic target in the conventional sense. PP2A itself is the actual target of therapeutic interest.