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tagFP sdAb - FluoTag-Q - N0501-Ab635P-L

A blue fluorescent protein tag


This product was developed by   


FluoTags are camelid single domain antibodies consisting only of one antigen binding site of a Alpaka heavy chain antibody. With only ~15 kDa, these Tags are about 10-times smaller than conventional IgG antibody molecules.

Single Domain

Cat. No.: N0501-Ab635P-L
Amount: 200 µl
Price: $485.00
Cat. No. N0501-Ab635P-L

200µl 5µM camelid sdAb in buffered saline, 50% glycerol, 0.09% sodium azide

Storage Up to three months: -20°C
Up to 12 months: -80°C or below
Protect form light!
Applications WB: not recommended
ICC: 1 : 1000 gallery  
IHC: not tested yet
IHC-P/FFPE: not tested yet
Label AbberiorStar 635P, one fluorophore coupled to one FluoTag
Clone 1H7
Subtype single domain
Immunogen Recombinant protein corresponding to AA 1 to 232 from mTag-BFP
Specificity Recognizes mTagBFP, mTagRFP and mKate and its most common fluorescent proteins deriving from Entacmaea quadricolor.
Does not cross-react with common GFP- or dsRed derivatives.
Documents data sheet

Cat. No.: N0501-Ab635P-L
Quantity: 200 µl
Price: $485.00

Blue fluorescent protein BFP is a monomeric fast maturating and highly photostable protein that is suited for protein labeling in acidic environments due to its high pH stability. BFP has a bright blue fluorescence with excitation/emission maxima at 402 and 457 nm and is a preferred candidate for multi color imaging.


In FluoTag-Q each fluorophore is coupled to exactly one FluoTag, which in turn binds to its target molecule in a monovalent fashion. The high binding affinity and a coupling efficiency of > 95% guarantees a highly linear relation between the number of target molecules and the intensity of fluorescence. This enables a direct count of the target molecule of interest. The fluorophore is located exceptionally close to the recognized epitope (less than 1.5 nm), which is ideal for all microscopy techniques.

In FluoTag-X two fluorophore molecules are site-specifically coupled to each FluoTag molecule. Owing to the small size of the FluoTags, the distance between the target epitope and each fluorophore is below 4 nm.
In comparison to detection systems using conventional antibodies, FluoTag-X can thus improve the localization accuracy by 10-15 nm. Both features - superior brightness and precise fluorophore placement - render the FluoTag-X products excellent tools for all microscopy techniques.