USP25/28 inhibitor AZ1 (AZ1) 是一种有效，选择性，非竞争性的双重泛素特异性蛋白酶 USP25/28 抑制剂，IC50 分别为 0.7 μM, 0.6 μM。USP25/28 inhibitor AZ1 降低了一系列癌细胞系的细胞活力。

HSP990 is an orally bioavailable inhibitor of human heat-shock protein 90 (Hsp90) with potential antineoplastic activity.

MLN2238 inhibits the chymotrypsin-like proteolytic (β5) site of the 20S proteasome with IC50 and Ki of 3.4 nM and 0.93 nM, respectively, also inhibits the caspase-like (β1) and trypsin-like (β2) proteolytic sites, with IC50 of 31 and 3500 nM.

LDN-57444 is a reversible, competitive proteasome inhibitor for Uch-L1 with IC50 of 0.88 μM, 28-fold selectivity over isoform Uch-L3.

PU-WS13 is a cell-permeable compound that selectively binds to Grp94 and inhibits its activity (EC50=220 nM).

PD 150606 is a selective, cell-permeable non-peptide calpain inhibitor (Ki values for ν and m-calpains are 0.21 and 0.37 μM respectively).

VER-155008 is a novel, small molecule inhibitor of Hsc70/Hsp70 with GI50 of 5.3-14.4 uM in human breast and colon cancer cell lines.

PD 151746 is a selective, cell-permeable calpain inhibitor with Ki of 0.26 μM for μ-Calpain, about 20-fold selectivity over m-calpain.

PI-1840 is a potent and selective inhibitor for chymotrypsin-like (CT-L) (IC50 value = 27 ± 0.14 nM) over trypsin-like and peptidylglutamyl peptide hydrolyzing (IC50 values >100 μM) activities of the proteasome.

PF-04929113 (SNX-5422) is a potent and selective Hsp90 inhibitor (Kd of 41 nM). PF-04929113 also inhibits Her-2 degradation (IC50 of 37 nM).