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cOmplete Protease Inhibitor Cocktail

Tablets provided in glass vials

Synonym: protease inhibitor tablet

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Properties

Related Categories Biochemicals and Reagents, Enzyme Inhibitors, Enzymes, Inhibitors, and Substrates, Protease Inhibitor Cocktails, Protease Inhibitors More...
form   tablet
packaging   vial of 20 tablets (11697498001)
  vial of 3 × 20 tablets (11836145001)
mfr. no.   Roche
optimum pH   <7.5
solubility   aqueous buffer: soluble
absorption   0.08 at 280 nm
shipped in   wet ice
storage temp.   2-8°C

Description

General description

cOmplete Protease Inhibitor Tablets inhibit a broad spectrum of serine, cysteine, and metalloproteases, as well as calpains. Due to the optimized composition of the tablets, they show excellent inhibition effects, and are well suited for the protection of proteins isolated from animal tissues, plants, yeast, and bacteria. cOmplete tablets contain EDTA and both irreversible and reversible protease inhibitors.

Specificity

Mixture of several protease inhibitors with broad inhibitory specificity. For the inhibition of serine, cysteine, and metalloproteases in bacterial, mammalian, yeast, and plant cell extracts.

Application

cOmplete Protease Inhibitor Cocktail has been used as a component of
• lysis buffer for the homogenisation of rat cavernosal smooth muscle (CSM) for obtaining membranous and cytosolic fractions
• cold buffer A for preparing cytosolic and nuclear extracts
• lysis buffer for homogenisation of tissues for determining protein expression by western blot
• phosphate buffered saline (PBS) for the lysis of rat retinae for enzyme linked immunosorbent assay (ELISA)

cOmplete is used for the inhibition of serine, cysteine, and metalloproteases in bacterial, mammalian, yeast, and plant cell extracts.
cOmplete contains both reversible and irreversible protease inhibitors. Therefore, we recommend the addition of cOmplete to all stock buffers and solutions normally protected with protease inhibitors, and not  just during the initial purification steps.
cOmplete contains EDTA (1 tablet yields a  1 mM EDTA solution in 50 ml). Therefore, the extraction buffer should not contain divalent cations like Ca2+ , Mg2+, or Mn2+, otherwise the inhibition of the metalloproteases might be incomplete. If the protein of interest will be purified by IMAC (Immobilized Metal Affinity Chromatography), for example, Poly-His-tagged recombinant proteins, EDTA has to be eliminated (e.g., by dialysis) prior to the chromatography.
Alternatively, the product cOmplete EDTA-free can be used. These tablets are identical to cOmplete, with the exception that no EDTA or other chelating agent is  present.
cOmplete Tablets inhibit proteolytic activity in large extraction volumes (up to 50 ml). If you are working with smaller volumes (up to 10 ml), we recommend to use cOmplete, Mini. The composition of the cOmplete, Mini Tablet is identical to the normal cOmplete Tablet.

Features and Benefits

Use cOmplete Protease Inhibitor Tablets to protect your proteins from a wide range of proteases. In just minutes, uninhibited proteolytic activity can degrade the protein you have spent days isolating. Each of these convenient water-soluble tablets contains a blend of protease inhibitors that inhibits proteolytic activity from most cell types, including animals, plants, yeast, and bacteria. No weighing or measuring is necessary, ensuring consistent results.

• Easy-to-use: Simply drop a quick-dissolving tablet into your buffer.
• Complete protection: Instantly protect your proteins against a broad range of proteases.
• Flexible: Protect proteins in extracts from almost any tissue or cell, including animals, plants, yeast, bacteria, or fungi.
• Safe: Choose non-toxic inhibitors that pose no risk to you or those around you.
• Suitable for IMAC purification: Purify poly-histidine tagged proteins with cOmplete His-Tag Purification Resin.

Components

Proprietary mixture of several protease inhibitors with broad inhibitory specificity.

Quality

Performance-tested with pancreas extract.

Physical form

Tablets in glass vials

Preparation Note

Working concentration: 1 tablet per 50 ml extraction solution
Working solution: Preparation of Working Solution:

One cOmplete Protease Inhibitor Tablet is sufficient for the inhibition of the proteolytic activity in 50 ml extraction solution. If very high proteolytic activity is present, one tablet should be used for 25 ml extraction buffer. Tablets can be added directly to the extraction medium. Alternatively, a stock solution (25 X conc.) can be prepared.

Preparation of Stock solution (25 X conc.):

Dissolve one cOmplete Protease Inhibitor tablet in 2 ml dist. water or in 2 ml 100 mM phosphate buffer, pH 7.0. The stock solution can also be prepared in 10 mM Tris buffer, pH 7.2 to 7.5.
Storage conditions (working solution): The stock solution can be stored at 2 to 8 °C for 1 to 2 weeks, or at least 12 weeks at -15 to -25 °C.

Reconstitution

Soluble in aqueous buffers, or add directly to extraction media. Alternatively, prepare 25x stock solutions in 2 ml water or 100 mM phosphate buffer, pH 7.0. Stock solution is stable for 1 to 2 weeks at 2 to 8 °C or at least 12 weeks at -15 to -25 °C; can also be used in thiol-containing solutions at 15 to 25 °C.

Other Notes

Inhibition efficiency is quickly and sensitively tested with the Universal Protease Substrate. For life science research only. Not for use in diagnostic procedures.

Legal Information

cOmplete is a trademark of Roche

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport

Documents

Certificate of Analysis (COA)

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Protocols & Articles

Articles

Protein Stabilization Reagents from Roche

Naturally-occurring proteases and phosphatases can destroy proteins that you spent days isolating. With Roche’s experience in protein isolation, purification, and protein protection against degradati...
Keywords: Affinity chromatography, Cell disruption, Chromatography, Degradations, Immobilization, Phosphorylations, Purification, Tagged proteins

Protocols

cOmplete™ His-Tag Purification Resin and Columns from Roche

Immobilized Metal Ion Affinity Chromatography (IMAC) using nickel is a method for protein purification, but it’s toxicity level may affect the protein and increase costs of toxic waste disposal. The ...
Keywords: Affinity chromatography, Chromatography, Degradations, Immobilization, Oxidations, Purification

cOmplete™ Protocol and Materials

Minimum volume to dissolve one tablet It is possible dissolve 1 tablet in as little as 2 ml double distilled Water, results in a 25x stock solution, without difficulty. as this can take some time, le...
Keywords: Buffers, Cell culture, Dialysis

Peer-Reviewed Papers
15

References

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