Protease & Protease Inhibitor Systems

Our Protease & Protease Inhibitor Systems include proteases, protease assays and screening systems, and protease inhibitors. A large variety of mass spectrometry, sequencing grade and general proteases are offered including Proteinase K, a high activity, non-specific serine protease, our partially purified Trypsin for general use and mass spectrometry grade MSG-Trypsin.


A selection of assays and screening systems for the detection of proteases are also available. We have protease activity assays such as our Protease Screening Kit and Protease Assay Kit. To identify destructive proteases, we offer ProteSEEKER. We also offer Fluoro™ Protease Assay, a fluorometric, quantitative protease assay. Both resorufin and FITC Casein protease substrates are also available.


A range of protease inhibitor cocktails and individual inhibitors can be found in our protease inhibitor section. ProteaseArrest has been proven to inhibit >95% of protease enzyme activity making it 80% more effective than tablet cocktail formats. Superior enzyme inhibition can also be achieved using our dry format inhibitor cocktail, ProteCEASE.


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Antipain Dihydrochloride

[(S)-1-Carboxy-2-Phenyl]-carbamoyl-Arg-Val-arginal   Specificity:  Inhibits Ca2+-dependent endopeptidases, including papain, trypsin-like serine proteases, some cysteine proteases and to..

Bacterial ProteaseArrest™

A broad range, 100X concentrated, ready-to-use protease inhibitor cocktail. Bacterial ProteaseArrest™ inhibits bacterial serine, cysteine and other bacterial specific proteases including aminope..

Immobilized Ficin

Ficin (or Ficain) is a cysteine protease enzyme (EC isolated from fig latex is that has the endopeptidase activity to cleave immunoglobulin G molecules in the hinge reason.  Ficin is ty..

Immobilized Papain

Papain is a cysteine protease enzyme (EC that has the endopeptidase activity to cleave immunoglobulin G molecules in the hinge region.  This cleavage results in the generation of three ..

Immobilized Pepsin

Pepsin is a proteolytic enzyme that is routinely used for the generation of F(ab)2 fragments from immunoglobulin G (IgG).  The pepsin has the ability to cleave the heavy chains near the hinge reg..

Immobilized Soybean Trypsin Inhibitor

 G-Biosciences Immobilized Soybean Trypsin Inhibitor (STI) resin is designed for the efficient removal of trypsin, chymotrypsin and elastase proteases from protein digests.  The action of th..

Immobilized Trypsin

Immobilized Trypsin is TPCK Treated Trypsin immobilized on 4% agarose that eliminates the contamination of protein digests by the trypsin.  The immobilized trypsin is readily removed by separatin..

InGel™ Blue

The InGel™ Blue kit provides a complete set of reagents for the in gel tryptic digestion and extraction of peptides for mass spectrometry (MALDI and LC MS/MS).  The kit is specifically desi..

Mammalian ProteaseArrest™

A broad range, 100X concentrated, ready-to-use protease inhibitor cocktail. Mammalian ProteaseArrest™ inhibits mammalian serine, cysteine and other mammalian specific proteases including aminope..

p-Aminobenzamidine Agarose

ρ-Aminobenzamidine Agarose primary application is for the removal and/or purification of trypsin-like proteases.  ρ-aminobenzamidine (PAB) is a synthetic inhibitor of trypsin-like proteas..

Protease Assay Substrates

RESORUFIN-CASEIN PROTEASE SUBSTRATE A colorimetric substrate that when treated with proteases releases resorufin that has an absorbance of 570nm. Supplied lyophilized. FITC-CASEIN PROTEASE SUBST..

Protease Inhibitor Set

Contains 12 ready-to-use individual protease inhibitors for characterization of protease activity. Each set contains the following protease inhibitors. See individual inhibitors for their specificiti..