2. Dye Reagents

Dye Reagents

A dye is a colored substance that has an affinity to the substrate to which it is being applied.

A new approach is presented for analysis of microplastics in environmental samples, based on selective fluorescent staining using Nile Red (NR), followed by density-based extraction and filtration. The dye adsorbs onto plastic surfaces and renders them fluorescent when irradiated with blue light. Fluorescence emission is detected using simple photography through an orange filter. Image-analysis allows fluorescent particles to be identified and counted. Magnified images can be recorded and tiled to cover the whole filter area, allowing particles down to a few micrometres to be detected. The solvatochromic nature of Nile Red also offers the possibility of plastic categorisation based on surface polarity characteristics of identified particles. This article details the development of this staining method and its initial cross-validation by comparison with infrared (IR) microscopy. Microplastics of different sizes could be detected and counted in marine sediment samples. The fluorescence staining identified the same particles as those found by scanning a filter area with IR-microscopy.

Cyanine dyes can be used to quantify the amount of dsDNA within a sample. The linearity of fluorescence, as function of DNA amount of six dyes, is obtained by measuring the fluorescence intensity at the optimal excitation and emission maxima.

Dye Reagents (3280):

Cat. No. Product Name CAS No. Purity Chemical Structure
  • HY-D2420
    Biotin-PEG5-Mal 98%
    Biotin-PEG5-Mal is a PROTAC linker, belonging to the PEG class. It can be used for the synthesis of PROTAC molecules.
    Biotin-PEG5-Mal
  • HY-D2421
    DEAE-dex-Cy5 98%
    DEAE-dex-Cy5 is a fluorescent labeling reagent that combines Cy5 (HY-D0821) fluorescent dye, Dextran (dex) and Diethylaminoethyl (DEAE). Cy5 is a Cyanine dye (with a long wavelength about 662nm) that can be used for molecular labeling and microscopy imaging. Dex has an inhibitory effect on thrombocyte aggregation and coagulation factors and is used as a plasma volume expander.
    DEAE-dex-Cy5
  • HY-D2426
    Cy3-Transferrin 98%
    Cy3-Transferrin is a fluorescent labeling reagent that combines Cy3 (HY-D0822) fluorescent dye and Transferrin (HY-P3267). The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. Transferrin, a blood-plasma glycoprotein, is a target ligand for transferrin receptor. Transferrin can bind to and mediate the transport of iron.
    Cy3-Transferrin
  • HY-D2428
    OVA-PEG-Cy3 98%
    OVA-PEG-Cy3 is a Cy3 (HY-D0822)-labeled OVA-PEG conjugate. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. The maximum emission wavelength of Cy3 is approximately 562-570 nm. Ovalbumins (OVA) (HY-W250978), the main protein found in egg whites, have various biological activities such as anticancer, antihypertensive, antibacterial, antioxidant and immunomodulatory activities. Ovalbumins are the most abundant proteins synthesized in progesterone- or estrogen-treated fallopian tubes and are commonly used as markers to study hormone regulation of gene expression in tissues.
    OVA-PEG-Cy3
  • HY-D2429
    Dextran-PEG-Cy3 98%
    Dextran-PEG-Cy3 is the Cy3 (HY-D0822)-labeled Dextran-PEG conjugate. Dextran-PEG is used as polymer-polymer systems for the high biocompatibility to maintain cell osmolarity. Dextran-PEG coatings can reduce nanoparticle cytotoxicity.
    Dextran-PEG-Cy3
  • HY-D2430
    Chitosan-PEG-Cy3 98%
    Chitosan-PEG-Cy3 is a fluorescent labeling reagent that combines Cy3 (HY-D0822) fluorescent dye, Chitosan and polyethylene glycol (PEG). The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. Chitosan exhibits antimicrobial activity against various bacteria and fungi.
    Chitosan-PEG-Cy3
  • HY-D2431
    Galactose-PEG-Cy3 98%
    Galactose-PEG-Cy3 is a Cy3 (HY-D0822) labeled Galactose-PEG conjugate. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. Galactose-PEG improves drug cellular uptake and reduces endosomal degradation, and can be used in drug delivery.
    Galactose-PEG-Cy3
  • HY-D2432
    Mannose-PEG-Cy3 98%
    Mannose-PEG-Cy3 is a Cy3 (HY-D0822) labeled Mannose-PEG.
    Mannose-PEG-Cy3
  • HY-D2434
    HRP-PEG-Cy3 98%
    HRP-PEG-Cy3 is a HRP and Cy3 (HY-D0822) labeled PEG. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm.
    HRP-PEG-Cy3
  • HY-D2436
    PTX-PEG-Cy3 98%
    PTX-PEG-Cy3 (Paclitaxel-PEG-Cy3) is a Cy3 (HY-D0822) labeled PTX-PEG conjugate. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. PTX stabilizes tubulin polymerization. PTX can cause both mitotic arrest and apoptotic cell death. PTX also induces autophagy.
    PTX-PEG-Cy3
  • HY-D2437
    DOX-PEG-Cy3 98%
    DOX-PEG-Cy3 (Doxorubicin-PEG-Cy3) is a Cy3 (HY-D0822) labeled DOX-PEG conjugate. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. DOX is a broad-spectrum anthracycline antibiotic with cytotoxic properties.
    DOX-PEG-Cy3
  • HY-D2438
    CDDP-PEG-Cy3 98%
    CDDP-PEG-Cy3 is a CDDP-PEG conjugate labeled with Cy3 (HY-D0822). The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. The maximum emission wavelength of Cy3 is approximately 562-570 nm. Cisplatin (CDDP) (HY-17394) is an antineoplastic chemotherapy agent by cross-linking with DNA and causing DNA damage in cancer cells. Cisplatin activates ferroptosis and induces autophagy.
    CDDP-PEG-Cy3
  • HY-D2439
    RGD-PEG-Cy3 98%
    RGD-PEG-Cy3 is a fluorescent labeling reagent that combines Cy3 fluorescent dye, peptide (RGD) and polyethylene glycol (PEG). The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. RGD is a peptide sequence (CRGDKGPDCiRGD) that binds to αvβ3 and αvβ5 integrin receptors on tumor neovasculogenesis to achieve specific tumor tissue targeting.
    RGD-PEG-Cy3
  • HY-D2440
    cRGD-PEG-Cy3 98%
    cRGD-PEG-Cy3 is a Cy3 (HY-D0822) labeled cRGD-PEG conjugate. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. cRGD can be used to modify lipid for improved stability.
    cRGD-PEG-Cy3
  • HY-D2474
    PSP 3030735-86-2 98%
    PSP is a two-photon fluorescent probe for selective and sensitive detection of H2Sn in live cells and tumor spheroids (Ex/Em = 440/640 nm). PSP can be utilized in ferroptosis research.
    PSP
  • HY-D2475
    2-Amino-5-methoxybenzamidoxime 1359828-78-6 98%
    2-Amino-5-methoxybenzamidoxime is a chemical probe for detection of ketone, including aromatic ketones, hydroxyl ketones, cyclic ketones and aliphatic ketones. 2-Amino-5-methoxybenzamidoxime exhibits an excitation maximal wavelength of 389 nm and a emission maximal wavelength of 515 nm.
    2-Amino-5-methoxybenzamidoxime
  • HY-D2476
    H2S Fluorescent probe 1 433254-36-5 98%
    H2S Fluorescent probe 1 (Compound 2) is a fluorescent probe that detects hydrogen sulfide (H2S) with almost no cytotoxicity. Upon the addition of increasing amounts of HS- to DMSO solution of H2S Fluorescent probe 1, a new absorption peak appears gradually at 485 nm. H2S Fluorescent probe 1, the fluorescence intensity notes at 434 nm increasing rapidly by titration of HS-.
    H2S Fluorescent probe 1
  • HY-D2477
    Sulfo-QSY21-NHS 1974271-78-7 98%
    Sulfo-QSY21-NHS is a fluorescent dye, which contains a NHS group that can react with amine groups (-NH2) in proteins or other molecules to form stable amide bonds. Sulfo-QSY21-NHS can be used in the synthesis of activity-based probes (ABPs).
    Sulfo-QSY21-NHS
  • HY-D2480
    BODIPY 480/508-cholesteryl linoleate 2260795-60-4 98%
    BODIPY 480/508-cholesteryl linoleate is a cell-permeable and fluorescently tagged derivative of Cholesteryl Linoleate (HY-W010697). BODIPY 480/508-cholesteryl linoleate has been used to monitor cholesterol trafficking in isolated human monocyte-derived macrophages (Ex/Em=480/508 nm).
    BODIPY 480/508-cholesteryl linoleate
  • HY-D2481
    Asante potassium green-2 (TMA) 1369302-21-5 98%
    Asante potassium green-2 (APG-2) TMA is a cell-impermeable K+ (potassium) sensitive fluorescent indicator (excitation/emission = 525/545 nm).
    Asante potassium green-2 (TMA)