ApopTag TdT Enzyme

ApopTag Terminal deoxynucleotidyl Transferase (TdT) is a recombinant enzyme intended for use in labeling the 3′-OH ends of fragmented DNA during apoptotic cell detection.


Quality Level



shipped in

dry ice

General description

ApopTag Terminal deoxynucleotidyl Transferase (TdT) is a recombinant enzyme intended for use in labeling the 3′-OH ends of fragmented DNA during apoptotic cell detection. Qualified for use with Apoptag In Situ Apoptosis Detection Kits (Catalog #s: S7100, S7101, S7110, S7111, S7160 and S7165).
ApopTag is a registered trademark of Serologicals Company.


300 μL in 1000 units/mL
1000 units/mL


Materials Provided:
Each vial contains 300 μl of ApopTag Terminal Transferase (TdT) Enzyme.
Instructions for Use

Prepare labeling mixture as follows:
77 μl ApopTag Reaction Buffer (S7105 or kit component # 02)
33 μl ApopTag TdT Enzyme
Mix well and keep on ice. This reagent may be prepared in advance and stored on ice for no more than 6 hours. The Reaction Buffer - TdT Enzyme mixture is ready for use at the "APPLY WORKING STRENGTH TdT ENZYME" step in The Complete ApopTag Manual.
Warnings and Precautions :
ApopTag Terminal Transferase (TdT) Enzyme contains potassium cacodylate (dimethylarsinic acid) as a buffer. This material is harmful if swallowed; avoid contact with skin and eyes (wear gloves, glasses); wash areas of contact immediately.

Storage and Stability

Recommended Storage -15°C to -25°C.

Legal Information

CHEMICON is a registered trademark of Merck KGaA, Darmstadt, Germany


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.


Health hazardEnvironment

Signal Word


Hazard Statements

WGK Germany


Certificate of Analysis

Certificate of Origin

Divya A Shiroor et al.
Current biology : CB, 30(11), 2166-2174 (2020-05-11)
Stem cells are continuously exposed to multiple stresses, including radiation and tissue injury. As central drivers of tissue repair and regeneration, it is necessary to understand how their behavior is influenced by these stressors. Planarians have an abundant population of...
Po-Nien Tsao et al.
Development (Cambridge, England), 136(13), 2297-2307 (2009-06-09)
Although there is accumulated evidence of a role for Notch in the developing lung, it is still unclear how disruption of Notch signaling affects lung progenitor cell fate and differentiation events in the airway epithelium. To address this issue, we...

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