You searched for: Protein Linking and Labeling Systems

Supplier: AAT BIOQUEST

iFluor® 568 Tris-NTA Chelator is used as a sensitive fluorescent probe for detecting polyhistidine-labelled proteins in combination with the addition of a heavy metal ion (such as Ni²⁺) in cells, solution and solid surfaces.

Supplier: Thermo Fisher Scientific

The amine group is the most common target for modifying protein molecules because it is abundant in the majority of proteins either due to the presence of lysine bearing amino side chain functionality or the N-terminal-amine. Amine-reactive biotinylation reagents can be divided into two groups based on water solubility: NHS-esters and sulfo-NHS-esters.

Supplier: AAT BIOQUEST

XFD488 is manufactured by AAT Bioquest, and it has the same chemical structure of Alexa Fluor® 488 (Alexa Fluor® is the trademark of ThermoFisher).

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

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

It is compatible with a wide variety of sample materials, including bacterial artificial chromosome (BAC) DNA, human genomic DNA, purified PCR products, supercoiled and linearized plasmid DNA.

Supplier: Thermo Fisher Scientific

Carboxyl groups, in the form of carboxy termini, aspartate residues or glutamate residues, can be targeted for biotin labeling using amine-derivatised biotin molecules. This reaction is mediated by a class of crosslinkers known as carbodiimides and results in the formation of an amide bond. The reaction with EDC, the most common carbodiimide crosslinker, is generally performed in an MES buffer at pH 4,5 to 5 and requires just minutes to complete.

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: Thermo Fisher Scientific

Cross linkers are used for the identification of near-neighbour protein relationships and ligand-receptor interactions. Homobifunctional, amine-reactive NHS esters or imidates, and heterobifunctional, amine-reactive, photoactivatable phenyl azides are the most commonly used crosslinkers for these 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: Thermo Fisher Scientific

The NHS-Azide and NHS-Phosphine Reagents are amine-reactive compounds for derivatising primary amines of proteins or amine-coated polymer surfaces. Once a protein or surface is azide- or phosphine-labelled, the two components are mixed for effective and stable conjugation. Phosphine groups react with azides via a Staudinger reaction to produce an aza-ylide intermediate that is trapped to form a stable, covalent amide bond. Because phosphines and azides are absent from biological systems, there is minimal background labelling of macromolecules found in cells or lysates.

Supplier: Thermo Fisher Scientific

Photoactivatable Biotin, Biotin-LC-ASA , Psoralen-PEG3-Biotin and TFPA-PEG3-Biotin each contain a photoactivatable group. When exposed to UV light, they become activated and insert non specifically into nearby molecules. These reagents may be used to label proteins and peptides, but they are also useful in labeling DNA, RNA and other molecules that do not contain any readily reactive functional groups. Psoralen-PEG3-Biotin contains a reactive psoralen group and is
designed to efficiently label nucleic acids. The psoralen group intercalates into the helix of DNA, allowing it to label efficiently and selectively. The psoralen can also stack along with the bases of single-stranded DNA or RNA increasing labeling efficiency and selectivity.

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: 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

VIC phosphoramidite is the most convenient building block to incorporate VIC tag into an oligonucleotide.

Supplier: AAT BIOQUEST

APC-Cy5.5 is a popular colour used in flow cytometry.

Supplier: AAT BIOQUEST

Biotin is widely used for labeling biomolecules, in particular, antibodies.

Supplier: AAT BIOQUEST

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

Supplier: Thermo Fisher Scientific

EZ-Link™ Desthiobiotinylation and Pull-down Kit is a complete set of reagents to biotin-label purified proteins and use them to purify interaction complexes using streptavidin agarose resin with mild elution conditions.

Supplier: AAT BIOQUEST

The kit is optimised for efficient labelling and contains all the essential reagents required for efficient labelling of ssDNA or oligos.

Supplier: AAT BIOQUEST

Our Buccutite™crosslinking technology provides the most convenient and effective crosslinking method to link two biomolecules with a high conjugation yield.

Supplier: AAT BIOQUEST

Cy5 is one of the most popular fluorescent labelling dyes for preparing orange-red fluorescent bioconjugates.

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

Helixyte™ iFluor® 555 Nucleic Acid labelling Dye is a key member of our enabling Helixyte™ nucleic acid labelling and conjugation technology.

Supplier: AAT BIOQUEST

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

Supplier: AAT BIOQUEST

Keyhole Limpet Hemocyanin (KLH) is one of the most commonly used carriers in the conjugation of peptides for antibody production.

Supplier: Thermo Fisher Scientific

Sulfo-SBED is a trifunctional crosslinking reagent containing a biotin, a sulfonated N-hydroxysuccinimide (Sulfo-NHS) active ester and a photoactivatable aryl azide

Supplier: AAT BIOQUEST

The kit is optimised for efficient labelling and contains all the essential reagents required for efficient labelling of ssDNA or oligos.

Supplier: AAT BIOQUEST

XFD555 is manufactured by AAT Bioquest, and it has the same chemical structure of Alexa Fluor® 555 (Alexa Fluor® is the trademark of ThermoFisher).

Supplier: AAT BIOQUEST

The kit uses a weakly fluorescent dye that carries a cell-retaining moiety.