Label Coupling

5(6)-Aminofluorescein (5(6)-AFM) is an amino-containing fluorescein dye primarily used for biomolecular labeling, fluorescence imaging, and as a precursor for the synthesis of fluorescent probes (Ex/Em = 495/515 nm).

BG-PEG-NH₂ (SNAP-PEG-NH₂) is an amino-terminal fluorescent probe building block and a precursor for site-specific labeling of SNAP-tag fusion proteins. BG-PEG-NH₂ undergoes one-step coupling with activated carboxyl esters to form customized SNAP-tag substrates, which covalently bind to SNAP tags via a thioether bond formed at the Cys145 site. After coupling with a caged carboxyfluorescein, BG-PEG-NH₂ forms a probe with Ex/Em = 500/524 nm following ultraviolet uncaging. Coupling of BG-PEG-NH₂ with SeTau-647-NHS enables visualization of GPCR signal transduction. BG-PEG-NH₂ is suitable for coupling reactions in aqueous phases or buffers, conjugation of labels, and labeling of intracellular or cell-surface proteins.

Fluorescein-5-maleimide (solution) (N-(5-Fluoresceinyl)maleimide (solution)) is a fluorescent dye. Fluorescein-5-maleimide can be used to detect the redox state of thiols in eukaryotic cells. Fluorescein-5-maleimide can label peptides and is used to detect negatively charged nanoparticles. Fluorescein-5-maleimide can also label actin to explore its interaction with cardiac myosin-binding protein C (cMyBP-C), which helps in developing small molecule modulators for heart failure. Fluorescein-5-maleimide can screen mutant proteins that contain cysteine residues. The excitation wavelength of Fluorescein-5-maleimide is 494 nm, and the emission wavelength is 519 nm.

Solvent and concentration: DMSO: 10 mM

Yellow AB (Solvent yellow 5) is an azo dye that can be used as food dye.

PEP azide is a multifunctional dye. Dyes are important tools in biological experiments. They can help researchers observe and analyze cell structures, track biomolecules, evaluate cell functions, distinguish cell types, detect biomolecules, study tissue pathology and monitor microorganisms. Their applications range from basic scientific research to clinical A wide range of diagnostics. Dyes are also widely used in traditional fields such as textile dyeing, as well as in emerging fields such as functional textile processing, food pigments and dye-sensitized solar cells.

4-Fluoro-2,1,3-benzoxadiazol (4-Fluorobenzofurazan) is a fluorescent benzofurazan derivative.

2,3-Di(furan-2-yl)quinoxaline (Compound 5) is a quinoxaline exhibiting blue fluorescence. 2,3-Di(furan-2-yl)quinoxaline is cell permeable and sufficiently bright at a micromolar concentration (1.5 μM).

Vari Fluor 594 SE (VF 594 SE) is a dye marker of the Vari Fluor SE series (Ex/Em=585 nm/609 nm). The Vari Fluor SE series of dyes are a class of fluorescent dyes containing NHS ester groups used to label free amines (-NHX) on antibodies, proteins, peptides, amine-modified oligonucleotides and other biomolecules.

Vari Fluor 568 SE (VF 568 SE) is a dye marker of the Vari Fluor SE series (Ex/Em=573 nm/595 nm). The Vari Fluor SE series of dyes are a class of fluorescent dyes containing NHS ester groups used to label free amines (-NHX) on antibodies, proteins, peptides, amine-modified oligonucleotides and other biomolecules.

Vari Fluor 350 SE (VF 350 SE) is a dye marker of the Vari Fluor SE series (Ex/Em=350 nm/448 nm). The Vari Fluor SE series of dyes are a class of fluorescent dyes containing NHS ester groups used to label free amines (-NHX) on antibodies, proteins, peptides, amine-modified oligonucleotides and other biomolecules.

Vari Fluor 350 TSA（200×） (VF 350 Tyramide) is a fluorescent probe belonging to the Vari Fluor TSA series. Vari Fluor TSA series fluorescent probes can be used for high-density in situ labeling of target antigens using horseradish peroxidase (HRP) assays, which are widely used in ELISA, IF, IHC and other techniques with high detection sensitivity.

Vari Fluor 750 Carboxylic acid (VF 750 Carboxylic acid) free acid is a carboxylic acid derivative of Vari Fluor. Vari Fluor carboxylic acid derivatives are unactivated labeled fluorescent dyes for protein, antibody, and polysaccharide labeling that require carboxylic acid activation for use.

NFQ1 is a non-fluorescent quencher (absorption wavelength: 474 nm), and is used for a new type of One Sample Fluorescence Resonance Energy Transfer (OS-FRET) method. OS-FRET enable measurement of unquenched donor emission in the same sample. NFQ1 shows broad absorption spectrum ensuring its utility as a dark acceptor for many donors.

7-Hydroxycoumarin-3-carboxylic acid N-succinimidyl ester is the amine-reactive succinimidyl ester of 7-Hydroxycoumarin-3-carboxylic acid. 7-Hydroxycoumarin-3-carboxylic acid N-succinimidyl ester is a blue fluorescent dye for labeling proteins and nucleic acids.

4-Methylphthalimide is a stain with biological research applications.

7-Fluorobenzofurazan-4-sulfonic acid ammonium is a fluorescent label. 7-Fluorobenzofurazan-4-sulfonic acid ammonium can be used for detecting dissolved thiol-disulfide (e.g., Cys, GSH).

5(6)-SFX ,SE (Compound SFX-SE) is a fluorescent dye for labeling primary amines and nascent proteins.

AMCA-X-SE is a coumarin derivative that generates fixed blue fluorescence and an NHS-activated ester that forms stable amide bonds with primary amine groups. It is used as a reactive dye for labeling amino groups of peptides, proteins, and oligonucleotides. Maximum excitation/emission wavelength: 354/442 nm.

Photocaged DAP (pm-DAP) TFA is a protected version of 2,3-Diaminopropionic acid (DAP) (HY-W013673). Photocaged DAP TFA can produce 2,3-Diaminopropionic acid after photodeprotection. Photocaged DAP TFA can be used as an intermediate to capture biosynthetic acylase.

SEluc-2 is a small-molecule probe based on the firefly luciferin. SEluc-2, a bioluminescent probe for the sensitive and selective detection of thiols in living cells.