Recombinant Human EpCAM/TROP1 His-tag Protein, CF

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Recombinant Human EpCAM/TROP1 His-tag Protein Bioactivity
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Product Details
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Recombinant Human EpCAM/TROP1 His-tag Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by the ability of the immobilized protein to support the adhesion of the L Cells mouse fibroblast cell line. When 5 x 104 cells/well are added to Recombinant Human EpCAM/TROP-1 and Human Fibronectin (0.5 μg/mL, Catalog # 1918-FN) coated plates, cell adhesion is enhanced in a dose dependent manner. The ED50 for this effect is 0.4-2.4 μg/mL.
Human embryonic kidney cell, HEK293-derived human EpCAM/TROP1 protein
Gln24-Lys265, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
No results obtained. Gln24 inferred from enzymatic pyroglutamate treatment revealing Glu25
Predicted Molecular Mass
28 kDa
30-42 kDa, reducing conditions

Product Datasheets

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping 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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

Bioactivity Recombinant Human EpCAM/TROP1 His-tag Protein Bioactivity View Larger

Immobilized Recombinant Human EpCAM/TROP1 (Catalog # 9277-EP) enhances L Cells mouse fibroblasts adhesion in the presence of Human Fibronectin (Catalog # 1918-FN). The ED50 for this effect is 0.4-2.4 µg/mL.

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Background: EpCAM/TROP1

Epithelial Cellular Adhesion Molecule (EpCAM), also known as KS1/4, gp40, GA733-2, 17-1A, and TROP‑1, is a 40 kDa transmembrane glycoprotein that consists of a 242 amino acid (aa) extracellular domain with two EGF‑like repeats, a 23 aa transmembrane segment, and a 26 aa cytoplasmic domain (1). Human and mouse EpCAM share 82% aa sequence identity. During embryonic development, EpCAM is detected in fetal lung, kidney, liver, pancreas, skin, and germ cells. In adults, human EpCAM is expressed on basolateral cell membranes of all simple, pseudo-stratified, and transitional epithelia but not on normal squamous stratified epithelia, mesenchymal tissue, muscular tissue, neuro-endocrine tissue, or lymphoid tissue (2). It is additionally expressed on undifferentiated embryonic stem cells, thymocytes, and dendritic cells (3-5). It is up-regulated on actively proliferating epithelial tissues, during adult liver regeneration, and on many epithelial cell-derived carcinomas (2, 6). EpCAM functions as a homophilic cell adhesion molecule (7). It associates into tetramers and forms complexes in cis with Claudin-7, CD44v6, TSPAN8, CD9, Integrin alpha 3, and Annexin A1 (8-11) that can interfere with cell adhesion (12, 13). Proteolytic cleavage of EpCAM releases multiple fragments from the ECD as well as a cytoplasmic fragment that can regulate gene transcription (14-16).

  1. Strnad, J. et al. (1989) Cancer Res. 49:314.
  2. Schnell, U. et al. (2013) Biochim. Biophys. Acta 1828:1989.
  3. Ng, V.Y. et al. (2010) Stem Cells 28:29.
  4. Nelson, A.J. et al. (1996) Eur. J. Immunol. 26:401.
  5. Borkowski, T.A. et al. (1996) Eur. J. Immunol. 26:110.
  6. de Boer, C.J. et al. (1999) J. Pathol. 188:201.
  7. Litvinov, S.V. et al. (1994) J. Cell Biol. 125:437.
  8. Balzar, M. et al. (2001) Mol. Cell. Biol. 21:2570.
  9. Nubel, T. et al. (2009) Mol. Cancer Res. 7:285.
  10. Kuhn, S. et al. (2007) Mol. Cancer Res. 5:553.
  11. Schmidt, D.S. et al. (2004) Exp. Cell Res. 297:329.
  12. Litvinov, S.V. et al. (1997) J. Cell Biol. 139:1337.
  13. Gaiser, M.R. et al. (2012) Proc. Natl. Acad. Sci. USA 109:E889.
  14. Schnell, U. et al. (2013) Biosci. Rep. 33:e00030.
  15. Schon, M.P. et al. (1993) Int. J. Cancer 55:988.
  16. Maetzel, D. et al. (2009) Nat. Cell Biol. 11:162.
Long Name
Epithelial Cell Adhesion Molecule
Entrez Gene IDs
4072 (Human); 17075 (Mouse); 171577 (Rat); 102123042 (Cynomolgus Monkey)
Alternate Names
17-1A; 323/A3; ACSTD1; antigen identified by monoclonal AUA1; CD326 antigen; CD326; Cell surface glycoprotein Trop-1; chromosome 4, surface marker (35kD glycoprotein); DIAR5; EGP; EGP-2; EGP314; EGP40; EpCAM; epithelial cell adhesion molecule; Epithelial cell surface antigen; Epithelial glycoprotein 314; Epithelial glycoprotein; ESA; GA733-2; GA733-2EGP34; gp40; hEGP314; HNPCC8; KS 1/4 antigen; KS1/4; KSAHEA125; M1S2; M4S1; M4S1Ly74; Major gastrointestinal tumor-associated protein GA733-2; MIC18MH99; MOC31; TACST-1; TACSTD1; TROP1; TROP1CD326; Tumor-associated calcium signal transducer 1CO-17A

Citation for Recombinant Human EpCAM/TROP1 His-tag Protein, CF

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. Endoplasmic reticulum retention motif fused to recombinant anti-cancer monoclonal antibody (mAb) CO17-1A affects mAb expression and plant stress response
    Authors: I Song, Y Kang, YK Lee, SC Myung, K Ko
    PLoS ONE, 2018;13(9):e0198978.
    Species: Bacteria - Agrobacterium tumefaciens
    Sample Types: Plant
    Applications: Bioassay


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