FluoTag®-X2 anti-TagFP

Cat No: N0502 Category:


FluoTag®-X2 anti-TagFP is derived from an in-house developed single-domain antibody (sdAb) that recognizes fluorescent proteins deriving from Entacmaea quadricolor, such as mTagBFP, mTagRFP, mTagRFP657 and mKate with high affinity and specificity.

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TagRFP was engineered in 2007 from TurboRFP (derived from Entacmaea quadricolor). Tag RFP displayed an extended fluorescence lifetime and showed robust photostability. In 2008 after further mutagenesis and the exchange of ~12 amino acid residues, this red-emitting protein turned into a blue-emitting protein TagBFP. Only several years later, in 2011 a monomeric version of TagBFP was described: mTagBFP2. An open-source database with the most currently available variants can be found in the fluorescence protein database “fpbase”

Our sdAb binds strongly to TagRFP, Tag BFP, and mTagBFP2. Have a look at our specificity chart in our Resource Section.

FluoTags are directly conjugated to fluorophores, however, they can be equipped with a single fluorophore for more quantitative readouts (FluoTag-Q), with two fluorophores per single-domain antibody (FluoTag-X2), and we also developed a blend of two sdAbs bindings simultaneously the target proteins and each bearing two fluorophores, decorating the target protein with 4 fluorophores in total (FluoTag-X4). For more detailed information on the FluoTags, please check our Technology Section.

Amount Conjugation Cat No.
Atto488 200 μl N0502-At488-L
AZDye568 200 μl N0502-AF568-L
Atto643 200 μl N0502-At643-L
Alexa647 200 μl N0502-AF647-L
AbberiorStar635P 200 μl N0502-Ab635P-L
Related Products: -
Clone: 1H7
Host: Alpaca
Produced in: E.coli
Application: IF
Dilution: 1:500 (corresponding to 5 nM final concentration)
Capacity: N/A
Antigen: -
Targets: tagBFP
Specificity: Recognizes TagRFP, Tag BFP and mTagBFP2.
Formulation: The single sdAb clone was lyophilized from PBS pH 7.4, containing 2% BSA (US-Origin). Reconstitute with 200 µL of 50 % glycerol in deionized water. We recommend including 0.1 % sodium azide as a preservative if applicable. When reconstituted with 200 µl, the concentration of single-domain antibody is 2.5 µM
kDa: -
Ext Coef: -
Shipping: Ambient temperature
Storing: Vials containing lyophilized protein can be stored at 4 °C for 6 months. We recommend reconstituting the protein with 50 % sterile glycerol including 0.1 % sodium azide as preservative if applicable. Minimize the number of freeze-thaw cycles by aliquoting the reconstituted protein. Long term storage at -80 °C for up to 6 months. Working aliquots can be stored at -20 °C for up to 4 weeks. We do not recommend storing the reconstituted protein at 4 °C.

This Product is not recommended to be used to detect proteins in Western Blott, sdAbs tend to recognize mainly native/folded proteins.

Look at detailed protocols and our specificity chart in our Resource Section.




References: -
Notice: To be used in vitro/ for research only. Non-toxic, non-hazardous, non-infectious.
Legal terms: By purchasing this product you agree to our general terms and conditions.