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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-D0715
    Fluorescamine
    		≥98.0%
    Fluorescamine is a spirocyclic compound that is non-fluorescent. Fluorescamine reacts rapidly with primary amine groups in proteins under alkaline conditions to generate products with strong fluorescence (Ex/Em: 390/475 nm). Fluorescamine can be used to detect amine-containing compounds, including amino acids, peptides, and proteins.
    Fluorescamine
  • HY-103469
    Peroxy Orange 1
    		99.20%
    Peroxy Orange 1 (PO1) is a new H2O2 specific probe that can bind to green fluorescent highly reactive oxygen species (hROS) probe APF. Peroxy Orange 1 is also a living cell dye.
    Peroxy Orange 1
  • 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-139579
    Pafolacianine
    		99.04%
    Pafolacianine (OTL 38) is a fluorescent imaging agent made of near-infrared dye used in detecting tumor lesions during surgical procedures. Pafolacianine excites at 774 to 775 nm and emits at 794 to 796 nm.
    Pafolacianine
  • 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-164745
    L-β-Ethynylserine
    		99.98%
    L-β-ethynylserine (βES) is a threonine analog. L-β-ethynylserine is efficiently incorporated into newly synthesized proteins, and allows their selective visualization or enrichment through bioorthogonal ligation to fluorescent dyes or affinity tags, respectively.
    L-β-Ethynylserine
  • HY-130735
    Janelia Fluor® 646, SE
    		99.67%
    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-D1159
    HKOH-1r
    		98.43%
    HKOH-1r is a highly sensitive green fluorescent probe for the specific detection of ·OH in living cells with a maximum excitation wavelength and emission wavelength of 500 nm and 520 nm, respectively.
    HKOH-1r
  • HY-W088075
    Acriflavine hydrochloride
    		99.4%
    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-D0926
    Cy7.5
    		99.94%
    Cy7.5 is a CY dye. CY, short for Cyanine, is a compound consisting of two nitrogen atoms connected by an odd number of methyl units. Cyanine compounds have the characteristics of long wavelength, adjustable absorption and emission, high extinction coefficient, good water solubility and relatively simple synthesis. CY dyes are of en used for the labeling of proteins, antibodies and small molecular compounds. For the labeling of protein antibodies, the combination can be completed through a simple mixing reaction. Below, we introduce the labeling method of protein antibody labeling, which has certain reference significance.
    Cy7.5
  • HY-118135
    4-Methylumbelliferyl-α-D-galactopyranoside
    		99.76%
    4-Methylumbelliferyl-α-D-galactopyranoside (4MU-α-Gal), a substrate for α-galactosidase A (GLA), is a blue pro-fluorogenic substrate. 4-Methylumbelliferyl-α-D-galactopyranoside forms two products, galactose and fluorescent 4MU, upon cleavage by GLA.
    4-Methylumbelliferyl-α-D-galactopyranoside
  • HY-D0259
    Erythrosine B
    		≥98.0%
    Erythrosine B is an artificial dye widely used in the food and textile industries. Erythrosine B is also a novel photosensitizer which has been used to develop animal models.
    Erythrosine B
  • HY-W011009
    PTCDA
    		≥98.0%
    PTCDA is an organic dye molecule and an organic semiconductor.
    PTCDA
  • HY-W094758A
    4-Di-1-ASP
    		99.95%
    4-Di-1-ASP is a styryl dye used to stain glioma cells in living brain tissue for analysis of cell structure, viability, proliferation and endocytosis, cytokinesis and phagocytosis, as well as for observation of mitochondrial structures in living cells. 4-Di-1-ASP fluoresces green when imaged microscopically (λex /λem = 475/606 nm) .
    4-Di-1-ASP
  • HY-D0823
    CY3-SE
    Cy3-SE (Sulfo-Cy3 NHS ester; Sulfo Cyanine3 NHS ester) is a sulfonated cyanine dye-derived fluorescent labeling reagent with λex of about 515 nm and λem of about 568 nm. Cy3-SE can interact with the π-π stacking of biomolecules (e.g., nucleoside monophosphates, proteins), inhibiting the photoisomerization process and increasing the fluorescence quantum yield and lifetime.
    CY3-SE
  • HY-D0826
    Cy2-SE (iodine)
    		98.11%
    Cy2-SE iodine is a CY dye. CY, short for Cyanine, is a compound consisting of two nitrogen atoms connected by an odd number of methyl units. Cyanine compounds have the characteristics of long wavelength, adjustable absorption and emission, high extinction coefficient, good water solubility and relatively simple synthesis. CY dyes are of en used for the labeling of proteins, antibodies and small molecular compounds. For the labeling of protein antibodies, the combination can be completed through a simple mixing reaction. Below, we introduce the labeling method of protein antibody labeling, which has certain reference significance.
    Cy2-SE (iodine)
  • HY-D1458
    Peroxyfluor 1
    Peroxyfluor 1 is a cell-permeable probe for H2O2. Peroxyfluor 1 represents a first-generation, green-fluorescent probe.
    Peroxyfluor 1
  • HY-D1601
    N-Aminofluorescein
    		99.91%
    N-Aminofluorescein is a fluorescein hydrazide with spiro form, a highly selective and sensitive fluorescence probe for Cu2+. N-Aminofluorescein has no selective fluorescence response to other common metal ions, can be used for direct detection of Cu2+ in biological systems with λex/em=495/516 nm. N-Aminofluorescein can be used to measure the concentration of copper ions in cells.
    N-Aminofluorescein
  • HY-P0019
    Z-Gly-Gly-Arg-AMC
    		99.90%
    Z-Gly-Gly-Arg-AMC is a thrombin-specific fluorogenic substrate for testing of thrombin generation in PRP and platelet-poor plasma (PPP) (Ex/Em = 390/480 nm).
    Z-Gly-Gly-Arg-AMC
Cat. No. Product Name / Synonyms Application Reactivity