Protein Linking and Labeling Systems

Supplier: AAT Bioquest

CytoWatch™ Wash-free fluorescence cell imaging buffer *10X* is a ready-to-use buffer optimised for fluorescence cell imaging.

Supplier: G-Biosciences

HOOK™ Biotin-Hydrazide and its long spacer arm equivalent, HOOK™ Biotin-LC-Hydrazide, are carbohydrate reactive reagents. HOOK™ carbohydrate reactive biotin reagents react with oxidised carbohydrate side chains. Some biotin reagents do not bind directly to the protein itself, but instead, conjugate to the carbohydrate residues of glycoproteins. The carbohydrate reactive biotin reagents contain hydrazides (-NH-NH₂) as a reactive group. The hydrazide reactions require carbonyl groups, such as aldehydes and ketones, which are formed by oxidative treatment of the carbohydrates. Hydrazides react spontaneously with carbonyl groups, forming a stable hydrazone bond. These reagents are particularly suitable for labelling and studying glycosylated proteins, such as antibodies and receptors.

Supplier: AAT Bioquest

ReadiLink™ Rapid antibody labelling kits, designed for production scale, provide a convenient and efficient method for labelling large volumes of antibodies with XFD dyes (equivalent to Alexa Fluor®).

Supplier: Thermo Fisher Scientific

Pierce™ Antibody Biotinylation Kit for IP provides biotinylation reagents designed specifically for the labelling of primary antibodies used in immunoprecipitation applications.

Supplier: G-Biosciences

FITC (fluorescein isothiocyanate) is a commonly used fluorescent label for proteins, as it contains the groups required for conjugating to amino, sulfhydryl, imidazoyl, tyrosyl or carbonyl groups of proteins. FITC has a molecular weight of 389, and excitation and emission wavelengths of 494 nm and 520 nm, respectively, therefore emitting green visible light.

Supplier: AAT Bioquest

iFluor® 532 WGA conjugate, like Alexa Fluor® 532 WGA conjugate, retains its ability to bind to sialic acid and N-acetylglucosaminyl residues, enhancing its utility in fluorescence imaging and analysis for various scientific investigations.

Supplier: AAT Bioquest

ReadiLink™ xtra rapid antibody labelling kits require essentially only two simple mixing steps without a column purification needed.

Supplier: Thermo Fisher Scientific

The DyLight™ Long Stokes Shift Dyes are amine-reactive fluorescent dyes that produce long Stokes (LS) shifts of 80 to 145 nm in excitation/emission wavelengths. The DyLight™ LS dyes provide multicolour detection using a single excitation source in applications including flow cytometry, conjugation, DNA-sequencing, microscopy and fluorescence in situ hybridization (FISH). These dyes contain N-hydroxysuccinimide (NHS) esters, the most commonly used reactive group for labeling proteins. NHS esters react with primary amines on proteins and other molecules, forming a stable, covalent amide bond and releasing the NHS group.

Supplier: AAT Bioquest

Oxidation of MitoROS™ 580 by superoxide generates red fluorescence.

Supplier: AAT Bioquest

AAT Bioquest's iFluor® dyes are developed for labelling proteins, in particular, antibodies.

Supplier: AAT Bioquest

AAT Bioquest's mFluor™ dyes are developed for flow cytometry-focused applications.

Supplier: Thermo Fisher Scientific

The Thermo Scientific™ Pierce™ MS-Compatible Magnetic IP Kit (Protein A/G) provides mass spectrometry-friendly reagents and an optimised protocol to enable highly effective and efficient immunoprecipitation and co-immunoprecipitation of target antigens upstream of LC-MS analysis.

Supplier: AAT Bioquest

Microscale optimised for labeling 50 µg antibody per reaction. ReadiLink™ Rapid mFluor™ Violet 610 antibody labelling kits provide a quick and convenient method to label antibodies, proteins (<10 kDa), or other amine-containing biomolecules.

Supplier: AAT Bioquest

ReadiLink™ Rapid antibody labelling kits, designed for production scale, provide a convenient and efficient method for labelling large volumes of antibodies with XFD dyes (equivalent to Alexa Fluor®).

Supplier: AAT Bioquest

DY677 CEP (DyLight 677 phosphoramidite) is an excellent replacement to the commonly used Cy5.5 phosphoramidite.

Supplier: AAT Bioquest

Protein-protein conjugations are commonly performed with a bifunctional linker (such as the commonly used SMCC), having different reactivity on each end for linking two different proteins.