FluoTag®-X2 anti-TagFP

FluoTag®-X2 anti-TagFP

3T3 cells transfected with the mitochondrial marker TOM70-mTagBFP, stained with FluoTag-X2 anti-TagFP Atto542 (red) and DAPI (blue). Due to the weak expression of the mTagBFP marker, only the DAPI signal is visible in the blue channel.

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. For a complete specificity chart see the Product Specificity Chart below. Our FluoTag-X2 series features two site-specifically coupled fluorophores per molecule. The reagent can therefore simultaneously target two fluorophores to your protein of interest, which results in enhanced image brightness. Owing to the small size of our FluoTags, the distance between the target epitope and each fluorophore is below 4 nm. In comparison to conventional detection systems using conventional antibodies, our FluoTag-X2 series can thus improve the localization accuracy by 10-15 nm. Both features – enhanced brightness and precise fluorophore placement – render our FluoTag-X2 products superior tools for all microscopy techniques.

Specificity: Recognizes mTagBFP, mTagRFP and mKate and most common fluorescent proteins deriving from Entacmaea quadricolor. Does not cross-react with common GFP- or dsRed derivatives.
Produced in: E.coli
Concentration: 2.5 µM protein, 5 µM fluorophore
Recommended dilution for IF/ ICC: 1:500
Available conjugates: Abberior® Star RED, Abberior® Star 580, Abberior® Star 635P, Alexa Fluor® 647, Atto 488, Atto 542, Atto 565, Atto 647N, Sulfo-Cyanin 3, Sulfo-Cyanin 5, DBCO and biotin. For other fluorophores or conjugates please contact us.
: Datasheet

Product List

Product name Coupled to Volume Net price (€) Catalog Number Order at Customized
FluoTag-X2 anti-TagFP see above 20 µl see webshop N0502


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FluoTag-X2 anti-TagFP see above 200 µl see webshop N0502


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This information is provided without liability and may be subject to change without prior notification.


Gombkoto et al. (2019) Contribution of the Basal Forebrain to Corticocortical Network Interactions