(+)-Nutlin-3 is the enantiomer and less active form of the p53-Mdm2 protein-protein interaction inhibitor (–)-nutlin-3 . It inhibits the interaction between p53 and Mdm2 150-fold less potently than (–)-nutlin-3 with an IC50 value of 13.6 μM. (+)-Nutlin-3 has been used as a negative control for the p53-modulating activity of (–)-nutlin-3 in cancer cells.
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