WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 510332

CAS#: 117591-20-5

Description: Calpeptin is a rho kinase activator and an inhibitor of calpains, a family of calcium-dependent cysteine proteases involved in apoptosis, long-term potentiation in neurons, and cell cycle progression. Calpeptin attenuates apoptosis and inflammation, cell death, and axonal damage in animal model of multiple sclerosis. Calpeptin provides functional neuroprotection to rat retinal ganglion cells following Ca2+ influx.

Chemical Structure

CAS# 117591-20-5

Theoretical Analysis

MedKoo Cat#: 510332
Name: Calpeptin
CAS#: 117591-20-5
Chemical Formula: C20H30N2O4
Exact Mass: 362.22056
Molecular Weight: 362.46
Elemental Analysis: C, 66.27; H, 8.34; N, 7.73; O, 17.66

Price and Availability

Size Price Availability Quantity
50.0mg USD 250.0 2 Weeks
100.0mg USD 450.0 2 Weeks
200.0mg USD 850.0 2 Weeks
500.0mg USD 1750.0 2 Weeks
1.0g USD 2950.0 2 Weeks
2.0g USD 4950.0 2 Weeks
Bulk inquiry

Synonym: Calpeptin; Benzylcarbonyl-leu-nleu-H; N-Cbz-leu-nleu-al.

IUPAC/Chemical Name: benzyl ((S)-4-methyl-1-oxo-1-(((S)-1-oxohexan-2-yl)amino)pentan-2-yl)carbamate


InChi Code: InChI=1S/C20H30N2O4/c1-4-5-11-17(13-23)21-19(24)18(12-15(2)3)22-20(25)26-14-16-9-7-6-8-10-16/h6-10,13,15,17-18H,4-5,11-12,14H2,1-3H3,(H,21,24)(H,22,25)/t17-,18-/m0/s1


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 362.46 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.

1: Shi L, Guo H, Huang J, Ma S, Chen X, Zhu X. [The effect of calpeptin on injury and atrophy of diaphragm under mechanical ventilation in rats]. Zhonghua Wei Zhong Bing Ji Jiu Yi Xue. 2014 Aug;26(8):549-53. doi: 10.3760/cma.j.issn.2095-4352.2014.08.005. Chinese. PubMed PMID: 25124902.

2: Singh NK, Shiwani S, Hwang IH. Proteomic study of calpeptin-induced differentiation on calpain-interacting proteins of C2C12 myoblast. In Vitro Cell Dev Biol Anim. 2012 Mar;48(3):175-85. doi: 10.1007/s11626-012-9484-1. Epub 2012 Jan 21. PubMed PMID: 22271316.

3: Nozaki K, Das A, Ray SK, Banik NL. Calpeptin attenuated apoptosis and intracellular inflammatory changes in muscle cells. J Neurosci Res. 2011 Apr;89(4):536-43. doi: 10.1002/jnr.22585. Epub 2011 Feb 2. PubMed PMID: 21290412; PubMed Central PMCID: PMC3076617.

4: Tabata C, Tabata R, Nakano T. The calpain inhibitor calpeptin prevents bleomycin-induced pulmonary fibrosis in mice. Clin Exp Immunol. 2010 Dec;162(3):560-7. doi: 10.1111/j.1365-2249.2010.04257.x. Epub 2010 Sep 15. PubMed PMID: 20846163; PubMed Central PMCID: PMC3026560.

5: Guyton MK, Das A, Samantaray S, Wallace GC 4th, Butler JT, Ray SK, Banik NL. Calpeptin attenuated inflammation, cell death, and axonal damage in animal model of multiple sclerosis. J Neurosci Res. 2010 Aug 15;88(11):2398-408. doi: 10.1002/jnr.22408. PubMed PMID: 20623621; PubMed Central PMCID: PMC3164817.

6: Peng S, Kuang Z, Zhang Y, Xu H, Cheng Q. The protective effects and potential mechanism of Calpain inhibitor Calpeptin against focal cerebral ischemia-reperfusion injury in rats. Mol Biol Rep. 2011 Feb;38(2):905-12. doi: 10.1007/s11033-010-0183-2. Epub 2010 May 16. PubMed PMID: 20473717.

7: Gwozdz AM, Leung R, Wang H, Bang KW, Packham MA, Freedman J, Rand ML. Calpain inhibition by calpeptin does not prevent APLT activity reduction in PS-exposing platelets, but calpeptin has independent pro-apoptotic effects. Thromb Haemost. 2010 Jun;103(6):1218-27. doi: 10.1160/TH09-08-0557. Epub 2010 Mar 29. PubMed PMID: 20352156.

8: Lin IJ, Zhou Z, Crusselle-Davis VJ, Moghimi B, Gandhi K, Anantharaman A, Pantic D, Huang S, Jayandharan G, Zhong L, Srivastava A, Bungert J. Calpeptin increases the activity of upstream stimulatory factor and induces high level globin gene expression in erythroid cells. J Biol Chem. 2009 Jul 24;284(30):20130-5. doi: 10.1074/jbc.M109.001461. Epub 2009 Jun 2. PubMed PMID: 19491096; PubMed Central PMCID: PMC2740439.

9: Mani SK, Shiraishi H, Balasubramanian S, Yamane K, Chellaiah M, Cooper G, Banik N, Zile MR, Kuppuswamy D. In vivo administration of calpeptin attenuates calpain activation and cardiomyocyte loss in pressure-overloaded feline myocardium. Am J Physiol Heart Circ Physiol. 2008 Jul;295(1):H314-26. doi: 10.1152/ajpheart.00085.2008. Epub 2008 May 16. PubMed PMID: 18487434; PubMed Central PMCID: PMC2494745.

10: Kook SH, Choi KC, Son YO, Lee KY, Hwang IH, Lee HJ, Chung WT, Lee CB, Park JS, Lee JC. Involvement of p38 MAPK-mediated signaling in the calpeptin-mediated suppression of myogenic differentiation and fusion in C2C12 cells. Mol Cell Biochem. 2008 Mar;310(1-2):85-92. Epub 2007 Dec 4. PubMed PMID: 18057999.

Additional Information