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C1907 Sigma

Calcineurin from bovine brain

lyophilized powder, ≥2,500 units/mg protein

Synonym: Calcium/Calmodulin-Activated Protein Phosphatase, Calmodulin binding protein, Modulator binding protein, PP2B, Phosphoprotein Phosphohydrolase, Protein phosphatase 2B



Analysis Note

Sigma tests activity in 80 mM Tris, pH 7.5 with 65 mM KCl, 8 mM MgSO4 and 0.3% albumin.

Unit Definition

One unit will cause a 50% inhibition of the activated phosphodiesterase, 3′:5′-cyclic nucleotide (P 9529) activity when assayed with two units of activator (P 2277) and 0.1 mM Ca2+ in an enzyme coupled system at pH 7.5 at 30 °C.

Physical form

Lyophilized powder containing 0.5% EGTA, buffer salts and stabilizers.

Biochem/physiol Actions

Calcineurin is a cyclosporin-sensitive, calcium-regulated, serine-threonine protein phosphatase with broad substrate specificity. It is the major calmodulin-binding protein found in the brain. First identified as an inhibitor of the calmodulin activation of phosphodiesterase 3′:5′ cyclic nucleotide (PDE), calcineurin has similar effects on adenylate cyclase. Serves as a key enzyme involved in T-cell activation. Also involved in the hyperphosphorylation of tau protein in Alzheimer′s disease and has been shown to prevent calpain-mediated proteolysis of tau in differentiated PC12 cells.

Price and Availability

Amplified Detection

All labs need water

Biomedical Applications
Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

Protocols & Articles
Peer-Reviewed Papers


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