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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. N1302-At488-L||
200 µl purified antibody, lyophilized from PBS, fluorescence-labeled with ATTO® 488.
For many of the fluorescence labeled antibodies conjugated to ATTO® dyes from
ATTO®488, ATTO®647N and ATTO®594 dyes are suitable for Stimulated Emission Depletion (STED) microscopy which allows higher resolution imaging compared to confocal laser scanning microscopy.
This product or portions thereof is manufactured under license from ATTO-TEC GmbH.
Reconstitute immediately upon receipt! Avoid bright light when working with the antibody to minimize photo bleeching of the fluorescent dye.
Up to three months: -20°C
Up to 12 months: -80°C or below
Protect from light!
Immunoprecipitation (IP); Immunoisolation or pulldown of a target molecule using an antibody. For details and product specific hints, please refer to the ”Remarks” section.', $event)" style="cursor: help;">IP: N/A
Immunocytochemistry (ICC) on 4% PFA fixed cells. Immunoreactivity is usually revealed by fluorescence. Some antibodies require special fixation methods. For details, please refer to the “Remarks” section.', $event)" style="cursor: help;">ICC: 1 : 500
Immunohistochemistry (IHC-P) of formalin fixed, paraffin embedded (FFPE) tissue (some antibodies require special antigen retrieval steps, please refer to the ”Remarks” section). Immunoreactivity is usually revealed by fluorescence or a chromogenic substrate.', $event)" style="cursor: help;">IHC-P: not tested yet
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||ATTO 488, two fluorophores coupled to one FluoTag|
|Immunogen||Recombinant protein corresponding to AA 1 to 232 from sea anemone mScarlet-i|
|Specificity||Specific for mScarlet-i and most common RFP derivatives|
mScarlet-i is a basic, very bright red fluorescent protein, derived from a synthetic construct (1). It is reported to be a rapidly-maturing, constitutively fluorescent monomer with moderate acid sensitivity. It is a useful acceptor in Foerster resonance energy transfer (FRET) based imaging techniques (2).
Unlabeled variants and several modifications of sdAbs like biotin, fluorophore or DBCO conjugation are available.
In FluoTag®-X2 two fluorophore molecules are site-specifically coupled to each FluoTag molecule. Therefore, the reagent simultaneously targets two fluorophores to the protein of interest, which ensures up to two-fold („2X“)-brighter 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.