All Photos(1)




Calpain Activity Assay Kit, Fluorogenic

Sign Into View Organizational & Contract Pricing


sufficient for 96 tests

Quality Level


pkg of 1 96-well plate(s)



storage condition

OK to freeze
avoid repeated freeze/thaw cycles
protect from light


sample type serum
sample type plasma
sample type cell lysate

detection method


shipped in

wet ice

General description

Calpains are Ca2+-dependent proteinases, which are involved in normal cellular processes including cell proliferation, apoptosis, differentiation, and cell migration. Requires a fluorimeter or microplate reader capable of measuring fluorescence at wavelengths of Excitation max: ~360 nm and Emission max: ~460 nm.


Calibration Standard, Positive Control Calpain 1, Substrate, Activation Buffer, Inhibition Buffer, Reduction Agent, Assay Buffer, Cell Lysis Buffer, 96-Well Plate, Plate Sealer, and a user protocol.


Toxicity: Multiple Toxicity Values, refer to MSDS (O)


Assay Time: 1.5 h

Preparation Note

1. Cell lysates: a. Wash cell pellet with ice-cold PBS.b. Add 500-1000 µl Lysis Buffer (approximately 1 ml per 1 x 107 cells) and incubate on ice for 30 min.c. Vortex and centrifuge the lysate at 14,000 x g in a pre-cooled tabletop microcentrifuge.d. Transfer the supernatant to a fresh tube immediately and discard the pellet.e. Dilute the lysate at least 1:10 before determining the protein concentration using a BCA protein assay.2. Dilute samples with Assay Buffer if necessary. Typically, cell lysates with a protein concentration >3 mg/ml should be diluted 5-fold. If the measured RFU exceeds 6000 the sample should be diluted further.
Note: All reagents necessary to perform the assay are supplied with this kit. Warm all components (except the Control Human Calpain-1) to 15-25°C (room temperature) before use; store the Control Human Calpain-1 on ice until use. For best results prepare dilutions of reagents only as needed. • Diluted Standards: The AMC standard is supplied as a 1 mM stock solution (100-fold concentrated solution). To prepare a calibration curve use serial dilutions of the standard ranging from a concentration of 0.625-10 µMExample: Label 6 eppendorf tubes. Pipet 495 µM Assay Buffer into the first tube and 200 µl into the remaining tubes. Add 5 µl AMC Standard to the first tube. Vortex and transfer 200 µl from this tube to the next tube. Continue serial dilutions by transferring 200 µl to consecutive tubes up to tube 5. The tube labeled 6 will contain Assay Buffer only (Blank). • Diluted Substrate: Dilute Substrate 100-fold with Assay Buffer. Example: to prepare enough Substrate for 6 strips dilute 30 µl Substrate with 2.97 ml Assay Buffer.• Activation Buffer, Final: The Reduction Reagent (TCEP) must be added to the Activation Buffer just prior to use. Example: to prepare Activation Buffer, Final add 20 µl Reduction Reagent 5 ml Activation Buffer. • Control Human Calpain-1: Dilute the Control Human Calpain-1 with Assay Buffer as indicated on the vial label. The Control Human Calpain-1 should be stored at -70°C to maintain activity. Once thawed and diluted it should be used immediately; diluted enzyme can be stored on ice for a few h.

Storage and Stability

Upon arrival, store the Control Human Calpain 1 at -70°C and the remaining components at -20°C. With the exception of the Control Human Calpain 1, all components, once opened, can be stored at 4°C for up to 1 month.

Analysis Note

Positive Control
Calpain 1

Other Notes

Dainese, E., et al. 2002. J. Biol. Chem.277, 40296.
Glading, A., et al. 2000. J. Biol. Chem.275, 23908.
Ishikara, I., et al. 2000. Neurosci. Lett.279, 97.
Nakagawa, T. and Yuan, J. 2000. J. Cell Biol.150, 887.
Pariat, M., et al. 2000. Biochem. J.345, 129.
Pink, J.J., et al. 2000.Exp. Cell Res.255, 144.
Wang, K.K. 2000. Trends Neurosci.23, 20.
Reddy, R.K., et al. 1999. J. Biol. Chem.274, 28476.
Leist, M., et al. 1998. Mol. Pharmacol.54, 789.
Melloni, E., et al. 1998. J. Biol. Chem.273, 12827.
Villa, P.G., et al. 1998. J. Cell Sci.111, 713.
Wood, D.E., et al. 1998. Oncogene17, 1069.
Kubbutat, M.H. and Vousden, K.H. 1997. Mol. Cell Biol.17, 460.
Molinari, M. and Carafoli, E. 1997. J. Membr. Biol.156, 1.
Sorimachi, H., et al. 1997. Biochem. J.328, 721.
Squier, M.K. and Cohen, J.J. 1997. J. Immunol.158, 3690.
Aoki, K., et al. 1986. FEBS Lett.205, 313.
Ohno, S., et al. 1986. Nucleic Acid Res.14, 5559.
Due to the nature of the Hazardous Materials in this shipment, additional shipping charges may be applied to your order. Certain sizes may be exempt from the additional hazardous materials shipping charges. Please contact your local sales office for more information regarding these charges.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany


Health hazard




Hazard Classifications

Repr. 1B

Storage Class

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects



Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).


Product Number
Pack Size/Quantity

Additional examples:





enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service