Date published: 2026-4-30

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cathepsin Z Inhibitors

Cathepsin Z inhibitors are primarily compounds that target cysteine proteases, a category of enzymes to which Cathepsin Z belongs. These inhibitors are often broad-spectrum, affecting multiple members of the cathepsin family, or are designed for closely related cathepsins but may show cross-reactivity with Cathepsin Z. E-64 is a well-known broad-spectrum cysteine protease inhibitor with proven efficacy against Cathepsin Z. Z-Phe-Tyr(tBu)-diazomethylketone is another potent inhibitor that has been shown to inhibit various cysteine proteases and is likely effective against Cathepsin Z. CA-074, while preferentially targeting Cathepsin B, may also inhibit Cathepsin Z due to the similarities in their active sites. Leupeptin and K11777 are broad-spectrum inhibitors that affect several cysteine proteases, potentially including Cathepsin Z. L-trans-Epoxysuccinyl-leucylamido(4-guanidino)butane (E-64) specifically targets cysteine proteases and is likely to inhibit Cathepsin Z. MDL28170, primarily a calpain inhibitor, also exhibits inhibitory activity against other cysteine proteases, suggesting a potential effect on Cathepsin Z. VBY-999, although selective for cathepsins L and S, might exhibit some level of inhibition towards Cathepsin Z due to the structural similarities among cathepsins.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

E-64

66701-25-5sc-201276
sc-201276A
sc-201276B
5 mg
25 mg
250 mg
$281.00
$947.00
$1574.00
14
(0)

A broad-spectrum cysteine protease inhibitor known to inhibit Cathepsin Z.

Z-Phe-Tyr(tBu)-diazomethylketone

114014-15-2sc-222423
1 mg
$68.00
(1)

A diazomethylketone inhibitor, potentially active against Cathepsin Z.

CA-074

134448-10-5sc-202513
1 mg
$321.00
(0)

Preferentially inhibits Cathepsin B but might have some activity against Cathepsin Z.

Leupeptin hemisulfate

103476-89-7sc-295358
sc-295358A
sc-295358D
sc-295358E
sc-295358B
sc-295358C
5 mg
25 mg
50 mg
100 mg
500 mg
10 mg
$73.00
$148.00
$316.00
$499.00
$1427.00
$101.00
19
(3)

A broad-spectrum inhibitor of cysteine, serine, and threonine proteases, possibly affecting CatZ.

K777

233277-99-1sc-507382
10 mg
$566.00
(0)

A potent cysteine protease inhibitor, likely to inhibit Cathepsin Z activity.

MDL-28170

88191-84-8sc-201301
sc-201301A
sc-201301B
sc-201301C
10 mg
50 mg
100 mg
500 mg
$69.00
$241.00
$447.00
$2195.00
20
(2)

A calpain inhibitor with potential activity against cysteine proteases like Cathepsin Z.

kb NB 142-70

1233533-04-4sc-358834
sc-358834A
10 mg
50 mg
$180.00
$750.00
3
(1)

A selective inhibitor of cathepsins L and S, might exhibit some inhibition towards Cathepsin Z.

Divinyl sulfone

77-77-0sc-255120
sc-255120A
10 g
50 g
$119.00
$271.00
(0)

A cysteine protease inhibitor that could potentially inhibit Cathepsin Z.

Odanacatib

603139-19-1sc-364675
sc-364675A
sc-364675B
5 mg
25 mg
250 mg
$218.00
$993.00
$1982.00
2
(1)

Initially developed as a Cathepsin K inhibitor, it might have some activity against Cathepsin Z.