Human Cystatin E/M Biotinylated Antibody

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Product Details
Citations (1)
Supplemental Products
Reviews (1)

Human Cystatin E/M Biotinylated Antibody Summary

Species Reactivity
Detects human Cystatin E/M in Western blots. In Western blots, approximately 20% cross-reactivity with recombinant mouse Cystatin E/M is observed, less than 5% cross-reactivity with recombinant human (rh) Cystatin D is observed, and less than 1% cross-reactivity with rhCystatin A, rhCystatin B, rhCystatin C, rhCystatin S, rhCystatin SA, rhCystatin SN, rhFetuin A, and rhFetuin B is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant human Cystatin E/M
Accession # Q15828
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.


Recommended Concentration
Western Blot
0.1 µg/mL
Recombinant Human Cystatin E/M (Catalog # 1286-PI)
5-15 µg/mL
Immersion fixed paraffin-embedded sections of human skin

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Cystatin E/M

Cystatin E/M encoded by the CST6 gene is a member of family 2 of the cystatin superfamily (1, 2). It inhibits papain and cathepsin B, two of the cysteine proteases. Its mRNA was found in many tissues by the two groups who did initial cloning (1, 2). However, its protein was found only in skin and sweat glands by a third group (3). In addition to being a cysteine protease inhibitor, cystatin E/M is also a substrate for transglutaminases (3). It is required for viability and for correct formation of cornified layers in the epidermis and hair follicles, as ichq mice, with a null mutation in the cystatin E/M gene, have defects in epidermal cornification and die between 5 and 12 days of age (4). Cystatin E/M expression and function may not be limited to cutaneous epithelia. For example, it is found in rat brain and is induced during neuronal cell differentiation (5).

  1. Sotiropoulou, G. et al. (1997) J. Biol. Chem. 272:903.
  2. Ni, J. et al. (1997) J. Biol. Chem. 272:10853.
  3. Zeeuwen, P.L. et al. (2001) J. Invest. Dermatol. 116:693.
  4. Zeeuwen, P.L. et al. (2002) Hum. Mol. Genet. 11:2867.
  5. Hong, J. et al. (2002) J. Neurochem. 81:922.
Entrez Gene IDs
1474 (Human); 73720 (Mouse)
Alternate Names
CST6; cystatin 6; Cystatin E/M; cystatin M; cystatin M/E; Cystatin-6; cystatin-E; cystatin-M; cysteine proteinase inhibitor

Product Datasheets

Citation for Human Cystatin E/M Biotinylated Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. Invasion suppressor cystatin E/M (CST6): high-level cell type-specific expression in normal brain and epigenetic silencing in gliomas.
    Authors: Qiu J, Ai L, Ramachandran C, Yao B, Gopalakrishnan S, Fields CR, Delmas AL, Dyer LM, Melnick SJ, Yachnis AT, Schwartz PH, Fine HA, Brown KD, Robertson KD
    Lab. Invest., 2008;88(9):910-25.
    Species: Human
    Sample Types: Whole Tissue
    Applications: ICC


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Human Cystatin E/M Biotinylated Antibody
By Anonymous on 10/25/2020
Application: I using 50 µl/well, 0.2 µg/ml in PBS, pH 7.2. The result is great. Sample Tested: Cancer cell lysates Species: Human