2.2.2.1. D9 Shares the Same HsClpP Activation Mechanism as ADEP. Biochemical characterization of the D9− HsClpP interaction and activation of the protease revealed that, similar to the case for ADEP, binding of D9 induces stabilization of HsClpP’s active oligomeric state.Furthermore,D9 exhibited a high affinity for HsClpP that is illustrated by the compound’s effective displacement of EcClpX from preformed EcClpX−HsClpP complexes that are catalytically active.