Human Cystatin-A, His-Tag recombinant Protein

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Product Overview, Sizes and Prices



Synonyms: Cystatin-A, Cystatin-AS, Stefin-A, CSTA, STF1, STFA.

Source: E. coli

Purity: ≥ 95% as determined by reducing SDS-PAGE.

Physical state: Liquid

Manufacturer:  Active Bioscience

Article No. Size Price  
4100.950.005 5 µg 90 €
4100.950.020 20 µg 175 €
4100.950.199 1 mg on request

Please inquire for other vial sizes and custom vialing.



Product Details


Cystatin-A, Cystatin-AS, Stefin-A, CSTA, STF1, STFA.


Description of Human Cystatin-A, His-Tag

Cystatin A Human Recombinant produced in E. coli is a single, non-glycosylated, Polypeptide chain containing 118 amino acids (1-98a.a.) and having a molecular mass of 13.1 kDa.The Cystatin A is fused to a 20 amino acid His tag at N-terminus.


Biological Activity

The IC50 value is < 1.0nM. The inhibitory function of CSTA on protease activity of papain was measured by a fluorometric assay using Z-FR-AMC at pH 7.5 at 25C.



Store at 4°C if entire vial will be used within 2-4 weeks. Store, frozen at -20°C for longer periods of time. For long term storage it is recommended to add a carrier protein (0.1% HSA, order number: or, or BSA, order number: Please avoid repeated freeze-thaw cycles.


Lupe Zoom

Amino Acid Sequence



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