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5′ EndTag Nucleic Acid Labeling Kit
Description
End labeling is a favored method for applications in which an internal label might interfere with hybridization or sequence specific protein binding.
Features of the 5′ EndTag DNA/RNA Labeling Kit:
- Enables simple and uniform labeling of the 5′ end of a DNA, RNA or unmodified oligonucleotide molecule.
- Preserves the unmodified 3′ end of the oligonucleotide (ideal for the labeling of PCR primers as a result).
- Compatible with a choice of diverse labels – fluorophores, biotin, haptens, or affinity ligands*
Specifications
| Unit Size | 1 kit |
|---|---|
| Target for Labeling | DNA, Oligonucleotides, RNA |
| Required Reactive Group | 5 ‘-OH group of nucleic acid |
| Tag/Group Incorporated | Thiol |
| Safety Title | WARNING: NA – www.P65Warnings.ca.gov |
Kit Components
What’s in the box?
Materials suitable to perform 10 end labeling reactions of up to 0.6 nmols of 5′ ends (e.g. about 5 μg of a 25 base oligo) per reaction. This includes:
- T4 polynucleotide kinase
- 10x reaction buffer
- ATPγS
- Precipitant
- Alkaline Phosphatase
*Note: Thiol-reactive labeling reagent is not included in the kit and must be purchased separately. Labels suitable for this kit include:
- Biotin (Long Arm) Maleimide
- DNP Maleimide
- Fluorescein (Long Arm) Maleimide
- Fucose Maleimide
- Texas Red? Maleimide
Note regarding shipping: This item is shipped on wet ice and therefore requires additional shipping charges.
Documents
- User Guide
- Safety Data Sheet
- Download CoA
- Datasheet
Related Products
Biotin (Long Arm) Maleimide Catalog #: SP-1501-12
Fluorescein Maleimide Catalog #: SP-1502-12
Texas Red Maleimide Catalog #: SP-1505-3.6
3' EndTag DNA End Labeling System Catalog #: MB-9002
PHOTOPROBE? Biotin for Nucleic Acid Labeling Catalog #: SP-1000
PHOTOPROBE? (Long Arm) Biotin for Nucleic Acid Labeling Catalog #: SP-1020
QuantTag Biotin Quantitation Kit Catalog #: BDK-2000
Citations
Technical Information
End labeling is a favored method for applications in which the presence of an internal label might interfere with hybridization or sequence specific protein binding.
5' or 3' EndTag labeled nucleic acids can be used for applications such as DNA hybridization, PCR, in situ hybridization, the binding of capture probes to affinity matrices, or electrophoretic mobility shift assays (EMSA). Short oligonucleotides are labeled more efficiently with these systems than with other methods. In addition, end labeling of oligonucleotides is an economical alternative to having labels inserted during synthesis.
Both the 5' EndTag and 3' EndTag Nucleic Acid Labeling Systems enable the covalent attachment of a variety of fluorescent dyes, haptens, or affinity tags to the respective ends of a nucleic acid using thiol-specific chemistry. Labels containing thiol-reactive groups (maleimides, iodoacetamides, etc.) can easily be incorporated.
Labeling time is about 1 hour with very little hands-on time.
5' EndTag Labeling Kit
The 5' EndTag System labels 5' ends of DNA, RNA, or unmodified oligonucleotides. This kit is ideal for labeling PCR primers because a label is attached only to the 5' end, leaving the 3' end available for polymerization.
Labeling with the 5' EndTag Kit is achieved in two steps:
- T4 polynucleotide kinase transfers a thiophosphate from ATPγS to the 5' -OH group of the nucleic acid. (5' phosphorylated ends are converted to 5' -OH groups with the included alkaline phosphatase).
- Thiolated sample is coupled to a thiol-reactive label. The 5' EndTag Kit is designed to perform 10 labeling reactions of up to 0.6 nmols of 5' ends (e.g. about 5 μg of a 25 base oligo) per reaction. Thiol-reactive label is not included in the kit and should be selected separately.


Ln 1) Unlabeled primers
Ln 2) EndTag biotinylated forward primer and unlabeled reverse primer
Ln 3) Unlabeled forward primer and EndTag biotinylated reverse primer
Ln 4) EndTag biotinylated forward and reverse primers.





