p53

inhibits p53 binding to mitochondria by reducing its affinity for antiapoptotic proteins Bcl-2 and Bcl-XL.

Pifithrin-beta is a small molecule inhibitor of p53.

Pifithrin-a is a reversible inhibitor of p53-mediated apoptosis and p53-dependent gene transcription such as cyclin G, p21/waf1, and mdm2 expression.

NSC348884 is a nucleolar phosphoprotein that displays several biological activities in ribosome biogenesis, cell proliferation, cytoplasmic/nuclear shuttle transportation, nucleic acid binding, ribonucleic cleavage, and centrosome duplication. NSC 348884 is a putative inhibitor of nucleophosmin (NPM). NSC 348884 inhibits NMP oligomer formation, up-regulates p53 and induces apoptosis.

Idasanutlin is a potent and selective p53-MDM2 inhibitor.