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  4. Fluorescent Dye

Fluorescent Dye

Fluorescence is a phenomenon of photoluminescence in luminescence. When an atom is irradiated by light, some electrons around the nucleus jump from their original orbitals to higher energy orbitals under the influence of light energy, i.e., from the ground state to the first or second excited single-line state, etc. Due to the instability of the first or second excited singlet state, the electron returns from the excited singlet state to the ground state accompanied by released energy, resulting in fluorescence.

Fluorescent dyes can be covalently bound or physically adsorbed in the structure of the substance. The fluorescence properties allow for the characterization, localization and quantitative analysis of the labeled object. Fluorescent dyes have shown great potential for the detection of proteins, nucleic acids, cells, and immunoassays, attributed to the advantages in non-radioactive contamination, simple experimental operation and easy observation.

Fluorescent dyes have penetrated many fields such as pharmacology, physiology, environmental science, and information science, as well as functional studies of proteins and drug screening.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-15558A
    Hoechst 33258 trihydrochloride
    		99.51%
    Hoechst 33258 trihydrochloride is a marker dye in Hoechst series. Hoechst is A live nuclear marker dye. Hoechst binds to the grooves in the DNA double strand, which tends to be A/ T-rich DNA strand. Although it binds to all nucleic acids, the A/ T-rich double strand DNA significantly enhances fluorescence intensity Therefore,Hoechst dye can be used for living cell labeling. The fluorescence intensity of Hoechst dye increases with the increase of pH of solution.
    Hoechst 33258 trihydrochloride
  • HY-D0006
    Bathophenanthroline
    		99.76%
    Bathophenanthroline is a nitrogen-containing organic ligand that can form stable complexes with transition metal ions such as Ru2+. In proteomics, Bathophenanthroline is often used for in-gel protein staining. The negatively charged sulfonic acid groups of Bathophenanthroline interact electrostatically with the positively charged amino acid residues of proteins, thereby achieving specific binding to proteins and enhancing the fluorescent signal of detection. Bathophenanthroline can be used for protein separation and detection in SDS-PAGE gels in the field of proteomics, as well as other fluorescence studies[1]. Ex/Em=532 nm/610 nm[1].
    Bathophenanthroline
  • HY-126226
    MK-6240 Precursor
    		99.54%
    MK-6240 Precursor (6e) is the synthetic precursor of (18)[F]-MK-6240. (18)F]-MK-6240 is a tau positron emission tomography (PET) tracer for neurofibrillary tangles (NFTs), exhibiting high specificity and selectivity for binding to NFTs.
    MK-6240 Precursor
  • HY-W127715
    Lucifer Yellow CH dipotassium salt
    		99.87%
    Lucifer Yellow CH dipotassium is a high-intensity fluorescent probe containing free hydrazyl groups. Lucifer Yellow CH can react with fatty aldehydes at room temperature. Lucifer Yellow CH serves as a biological tracer to monitor neuronal branching, regeneration, gap junction detection and characterization, and selective ablation of cells after aldehyde fixation. Lucifer yellow CH displays the maximum excitation/emission of 430 nm/540 nm, respectively.
    Lucifer Yellow CH dipotassium salt
  • HY-D0084
    3,3'-Dihexyloxacarbocyanine iodide
    		99.62%
    3,3'-Dihexyloxacarbocyanine iodide is a carbocyanine dye which can be used to monitor changes in mitochondrial membrane potential.
    3,3'-Dihexyloxacarbocyanine iodide
  • HY-15941
    5(6)-FITC
    5(6)-FITC (Fluorescein 5(6)-isothiocyanate) is an amine-reactive derivative of a fluorescent dye, characterized by high absorbance and excellent fluorescence quantum yield. The isothiocyanate group of FITC can react with various functional groups on proteins, including amines, thiols, imidazoles, tyrosines and carbonyls, enabling the labeling of proteins such as antibodies and lectins. 5(6)-FITC has a wide range of applications, including flow cytometry, immunofluorescence, protease assays and conjugation. The maximum excitation/emission wavelengths are 492/518 nm.
    5(6)-FITC
  • HY-101888
    Cresyl Violet acetate
    Cresyl Violet acetate is a dye, which can be used to stain neurons.
    Cresyl Violet acetate
  • HY-118155
    9-Amino-6-chloro-2-methoxyacridine
    		99.56%
    9-Amino-6-chloro-2-methoxyacridine is a pH sensitive fluorescent probe. 9-Amino-6-chloro-2-methoxyacridine has been frequently used to measure changes in vacuolar pH when a specific substrate crosses the tonoplast through a putative H+/solute antiport system.
    9-Amino-6-chloro-2-methoxyacridine
  • HY-D1450
    IR-1048
    IR-1048 is a nitroreductase (NTR)-responsive near-infrared fluorescence (NIR)/photoacoustic (PA) imaging probe and photothermal agent. IR-1048 is coupled with a nitroimidazole group to form IR-1048-MZ. IR-1048-MZ is catalytically reduced by NTR in a hypoxic environment, restoring strong near-infrared absorption and fluorescence emission (NIR II window), while activating the photothermal effect. IR-1048 relies on NTR-mediated electron transfer to relieve intramolecular fluorescence quenching, achieving specific imaging and photothermal ablation of tumor hypoxic areas. IR-1048 is mainly used for high-contrast NIR II/photoacoustic imaging and photothermal therapy research and tumor diagnosis of the tumor hypoxic microenvironment.
    IR-1048
  • HY-121608
    Lumiflavin
    		99.79%
    Lumiflavin (Lumiflavine), a riboflavine analog, causes significant inhibition of riboflavine uptake. Lumiflavin can effectively reduce the riboflavin enrichment in cancer stem-like cells (CSCs) and sensitize the effect of cisplatin Diamminedichloroplatinum (DDP) on CSCs. Lumiflavin is promising for research of ovarian cancer.
    Lumiflavin
  • HY-W088075
    Acriflavine hydrochloride
    Acriflavine (Acriflavinium chloride) hydrochloride is a fluorescent acridine dye that can be used to label nucleic acid. Acriflavine hydrochloride is an antiseptic agent. Acriflavine hydrochloride is a potent HIF-1 inhibitor that prevents the dimerization of HIF-1α and HIF-1β subunits. Acriflavine hydrochloride inhibits the interaction between monocarboxylate transporter 4 (MCT4) and Basigin. Acriflavine hydrochloride is used in cancer research, such as breast cancer, brain tumor and chronic myeloid leukemia. Acriflavine hydrochloride is a potent papain-like protease (PLpro) inhibitor, which inhibits SARS-CoV-2.
    Acriflavine hydrochloride
  • HY-D1806
    Vari Fluor 594-Streptavidin
    Vari Fluor 594-Streptavidin is a dye marker of Vari Fluor-streptavidin consisting of labeling streptavidin with a Vari Fluor series of fluorescent probes. Streptavidin is a high-affinity tetramer protein, each tetramer consisting of four identical streptavidin subunits. Streptavidin binds to biotin specifically via a reversible non-covalent effect. Streptavidin can achieve rapid and efficient detection of biotin markers, and is often used in immunofluorescence (IF), enzyme-linked immunosorbent assay (ELISA), immunohistochemical staining (IFH), in situ hybridization (ISH) and other experiments. Ex/Em=590 nm/617 nm.
    Vari Fluor 594-Streptavidin
  • HY-W009756
    N-Phenylnaphthalen-1-amine
    N-Phenylnaphthalen-1-amine is a fluorescence probe for odorant-binding proteins (OBP) with a dissociation constant of 1.67 μM. N-Phenylnaphthalen-1-amine exhibits an excitation wavelength of 337 nM and an emission wavelength of 407 nM.
    N-Phenylnaphthalen-1-amine
  • HY-D1005H
    Poloxamer 188 (F68)
    Poloxamer 188 is a nonionic linear copolymer with surfactant properties. Poloxamer 188 exhibits anti-thrombotic, anti-inflammatory, and cytoprotective activities in various tissue injury models.
    Poloxamer 188 (F68)
  • HY-W010042
    L-Glucose
    		99.88%
    L-Glucose (L-(-)-Glucose) is a stereoisomer of D-Glucose (HY-B0389), which does not readily enter the brain. L-Glucose can promote food intake. L-glucose is combined with a fluorescence detector to produce a fluorescent probe that can be used to visualize and characterize cancer cells. L-Glucose also can be used in the research to enhance memory in mice.
    L-Glucose
  • HY-D0042
    NBD-Cl
    		99.52%
    NBD-Cl is a nonfluorescent reagent which becomes highly fluorescent after reaction with thiol or amino groups.
    NBD-Cl
  • HY-W247131
    DASPEI
    		99.86%
    DASPEI is a cationic styrenyl mitochondrial dye with large Stokes shift. DASPEI has excitation and emission wavelength at 550/573 nm, which has good light chromogenic property. DASPEI can stain mitochondria in living cells with good labeling property. And DASPEI can also be used to stain presynaptic nerve endings independently of neuronal activity.
    DASPEI
  • HY-130735
    Janelia Fluor® 646, SE
    Janelia Fluor 646, SE (JF646, SE) is a red fluorescent dye can be used in cellular imaging. Janelia Fluor products are licensed under U.S. Pat. Nos. 9,933,417, 10,018,624 and 10,161,932 and other patents from Howard Hughes Medical Institute.
    Janelia Fluor® 646, SE
  • HY-138159
    Boc-Lys(Ac)-AMC
    		99.53%
    Boc-Lys(Ac)-AMC is a cell-permeable fluorometric HDAC substrate (Ex/Em = 355 nm/460 nm).
    Boc-Lys(Ac)-AMC
  • HY-D1119C
    AF647-NHS ester triTEA
    		99.74%
    AF647-NHS ester is an analogue of Alexa Fluor 647 (AF647), which has excitation wavelength (λex) of 635 nm (conventional fluorescence detection)/620 nm (instantaneous detection).
    AF647-NHS ester triTEA
Cat. No. Product Name / Synonyms Application Reactivity