Ep23, 5'-DY647

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Cat.No. 6102 - Ep23, 5'-DY647 | C218H259F13N66O132P20
Description: High affinity fluorescently tagged aptamer for EpCam

Biological Activity

High affinity fluorescently tagged aptamer for EpCam (Kd = 39.42 nM in HT29 cells). Efficiently internalized upon binding to EpCAM. Exhibits rapid penetration of tumorspheres in vitro, as well as superior penetration, accumulation and retention in tumor xenografts in vivo than an antibody to the same target.

For optimal binding aptamers require refolding into their tertiary structure prior to use. Please refer to the accompanying protocol for information regarding refolding and aptamer use in unfixed cell imaging and flow cytometry.

Licensing Information

Sold under license from the patent holder, Deakin University, Australia.

Application of Ep23, 5'-DY647 in Immunocytochemistry

Application of Ep23, 5'-DY647 in Immunocytochemistry

Aptamer applied at 100 nM concentration to HT29 cells. Magnification 40x.

Image kindly provided by Birte Aggeler, Bio-Techne.

Technical Data

M. Wt 6782.21
Formula C218H259F13N66O132P20
Storage Store at -20°C
Aptamer type (DNA/RNA) RNA
Number of Bases 19
Sequence Modifications 2-fluoropyrimidines, 3'-inverted deoxythymidine cap, 5'-fluorescent DY647 tag

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

All Tocris products are intended for laboratory research use only.


Please refer to these solubility guidelines for Ep23, 5'-DY647 (Cat.No. 6102).

Preparing Stock Solutions

The following data is based on the product molecular weight 6782.21. Batch specific molecular weights may vary from batch to batch due to solvent of hydration, which will affect the solvent volumes required to prepare stock solutions.

Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 0.15 mL 0.74 mL 1.47 mL
5 mM 0.03 mL 0.15 mL 0.29 mL
10 mM 0.01 mL 0.07 mL 0.15 mL
50 mM 0 mL 0.01 mL 0.03 mL

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

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Product Datasheets

Safety Datasheet


References are publications that support the products' biological activity.

Shigdar et al (2011) RNA aptamer against a cancer stem cell marker epithelial cell adhesion molecule. Cancer Sci. 102 991 PMID: 21281402

Shigdar et al (2013) The use of sensitive chemical antibodies for diagnosis: detection of low levels of EpCAM in breast cancer. PLoS One. 8 e57613 PMID: 23460885

Xiang et al (2015) Superior performance of aptamer in tumor penetration over antibody: implication of aptamer-based theranostics in solid tumors. Theranostics. 5 1083 PMID: 26199647

If you know of a relevant reference for Ep23, 5'-DY647, please let us know.

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