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Camelid single domain antibodies (sdAbs) consist only of one antigen binding site of an Alpaca heavy chain antibody. With only ~15 kDa, these Tags are about 10-times smaller than conventional IgG antibody molecules.
Cat. No. N0505-DBCO |
250 µg purified antibody, lyophilized from PBS, fluorescence-labeled with DBCO.
Dibenzocyclooctyne (DBCO, ADIBO) is one of the most reactive cycloalkynes for strain promoted alkyne azide cycloaddition (spAAC), a copper-free click chemistry reaction. Reconstitute immediately upon receipt! Avoid bright light when working with the antibody to minimize photo bleeching of the fluorescent dye. |
Applications |
Fluorescence-activated cell sorting (FACS); usually cells are fluorescently labeled with antibodies against cell-surface antigens followed by cell-sorter analysis.', $event)" style="cursor: help;">FACS: yes |
Label | DBCO |
Clone | 1H7 |
Immunogen | Recombinant protein corresponding to AA 1 to 232 from mTag-BFP |
Specificity | mTagBFP, mKate, mKate2, mTagRFP, mTagRFP657 |
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.
Unlabeled variants and several modifications of sdAbs like biotin, fluorophore or DBCO conjugation are available.
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 (< 1.5 nm), which is ideal for all microscopy techniques.
In FluoTag®-X two fluorophore molecules are site-specifically coupled to each FluoTag molecule. Therefore, the reagent simultaneously targets up to four fluorophores (in X4 variants) to the protein of interest, which ensures extra-bright signals. Owing to the small size of the FluoTags, the distance between the target epitope and each fluorophore is ~ 3 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.