1. Search Result
Search Result
Pathways Recommended: Stem Cell/Wnt Cell Cycle/DNA Damage
Results for "

live cells

" in MedChemExpress (MCE) Product Catalog:

172

Inhibitors & Agonists

121

Fluorescent Dyes

4

Biochemical Assay Reagents

5

Peptides

9

MCE Kits

6

Click Chemistry

9

Oligonucleotides

Cat. No. Product Name Target Research Areas Chemical Structure
  • HY-W090090
    BODIPY 493/503
    100+ Cited Publications

    Pyrromethene 546

    Fluorescent Dye Others
    BODIPY493/503 is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells . Maximum excitation/emission wavelength: 493/503 nm .
    BODIPY 493/503
  • HY-D1055
    MitoSOX Red
    Maximum Cited Publications
    263 Publications Verification

    Fluorescent Dye Reactive Oxygen Species (ROS) Mitochondrial Metabolism Cancer
    MitoSOX Red is a live cell fluorescent probe that specifically targets mitochondria and is cell membrane permeable. MitoSOX Red enters mitochondria and is oxidized by superoxide but not by other ROS or RNS generating systems. The oxidized MitoSOX Red then binds to nucleic acids in mitochondria/nucleus, producing strong red fluorescence. MitoSOX Red can be used as a fluorescent indicator to specifically detect superoxide. In addition, superoxide dismutase (SOD) can prevent the oxidation of MitoSOX Red.
    Excitation/emission wavelength: 510/580 nm.
    MitoSOX Red
  • HY-110210

    BODIPY FL,SE

    Fluorescent Dye Others
    BODIPY FL NHS ester (BODIPY FL, SE) is a cell membranes-penatrable amine-reactive fluorescent probe. The maximum excitation/emission wavelength of the BODIPY-FL NHS ester are 502/511 nm, respectively. BODIPY-FL NHS ester has high stability and is insensitive to the polarity, pH and type of solvent, and can maintain stable fluorescence properties under different environmental conditions. BODIPY-FL NHS ester can be used for the synthesis of protease substrates, live cell imaging, protein labeling and immunoassay .
    BODIPY-FL NHS ester
  • HY-110251
    DFHBI-1T
    15+ Cited Publications

    DNA Stain Others
    DFHBI-1T is a membrane-permeable RNA aptamers-activated fluorescence probe (ex/em=472 nm/507 nm). DFHBI-1T binds to RNA aptamers (Spinach, Spinach2, iSpinach, and Broccoli) and causes specific fluorescence and lower background fluorescence. DFHBI-1T is used to image RNA in live cells .
    DFHBI-1T
  • HY-D0971
    Pyronin Y
    4 Publications Verification

    Pyronine G; C.I. 45005

    DNA Stain Others
    Pyronin Y (Pyronine G) is a cationic dye that intercalates RNA and has been used to target cell structures including RNA, DNA and organelles. Pyronin Y forms fluorescent complexes with double-stranded nucleic acids (especially RNA) enabling semi-quantitative analysis of cellular RNA. Pyronin Y can be used to identify specific RNA subspecies of ribonuclear proteins complexes in live cells .
    Pyronin Y
  • HY-D1237
    BODIPY 505/515
    2 Publications Verification

    Fluorescent Dye Metabolic Disease
    BODIPY505/515 is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells . Maximum excitation/emission wavelength: 505/515 nm .
    BODIPY 505/515
  • HY-D1614
    BODIPY 493/503 methyl bromide
    15+ Cited Publications

    Fluorescent Dye Others
    BODIPY493/503 methyl bromide is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells . Maximum excitation/emission wavelength: 493/503 nm .
    BODIPY 493/503 methyl bromide
  • HY-15558
    Hoechst 33258
    20+ Cited Publications

    bisBenzimide H 33258; H 33258

    Fluorescent Dye DNA Stain DNA Alkylator/Crosslinker Others
    Hoechst 33258 is a blue to blue-green fluorescent live cell dye that can label DNA. Hoechst 33258 can specifically bind to the minor groove of DNA (and tends to bind to A/T-rich DNA), resulting in a significant increase in fluorescence intensity. Hoechst 33258 can cross the cell membrane and cause changes in DNA structure, such as G2/M phase arrest. Hoechst 33258 can bind to live or fixed cells, and the fluorescence intensity increases with increasing solution pH. As a DNA-specific probe, Hoechst 33258 can be used to detect DNA content, analyze cell cycle, etc. The excitation wavelength of Hoechst 33258 is 350-365 nm, and the emission wavelength is 460-490 nm .
    Hoechst 33258
  • HY-D1106

    Fluorescent Dye Cancer
    BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions . Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells .
    Py-BODIPY-NHS ester
  • HY-138226
    BODIPY 558/568 C12
    4 Publications Verification

    Fluorescent Dye Others
    BODIPY 558/568 C12 is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells . Maximum excitation/emission wavelength: 558/568 nm .
    BODIPY 558/568 C12
  • HY-D1696
    MitoTracker Orange CMTMRos
    1 Publications Verification

    Fluorescent Dye Others
    MitoTracker Orange CMTMRos is a fluorescent dye that labels mitochondria within live cells utilizing the mitochondrial membrane potential (Ex/Em: 551/576 nm) .
    MitoTracker Orange CMTMRos
  • HY-D2348A

    Fluorescent Dye Infection
    ACE TFA is a low-background, photostable fluorophore with nanomolar binding affinity for the Okra RNA aptamer. ACE TFA enables clear visualization of mRNA in live bacteria and mammalian cells, including tracking the trafficking of mRNA to stress granules and dual-color super-resolution imaging of RNA in live cells. (Ex=488 nm, Em=555 nm) .
    ACE TFA
  • HY-W094758A

    Fluorescent Dye Cancer
    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 (λexem = 475/606 nm) .
    4-Di-1-ASP
  • HY-D0832
    CY5-N3
    1 Publications Verification

    Sulfo-Cyanine5-azide

    DNA Stain Fluorescent Dye Infection
    CY5-N3 (Sulfo-Cyanine5-azide) is a Cy5-azide, which is a fluorescent dye (ex/em: 646/662 nm). CY5-N3 is cell membrane permeable and can be used for live cell imaging. CY5-N3 can be used in cell imagine by Click reaction .
    CY5-N3
  • HY-DY1004

    Fluorescent Dye Others
    BODIPY 493/503 (solution) is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells . Maximum excitation/emission wavelength: 493/503 nm.
    Solvent and concentration: DMSO: 5 mM.
    BODIPY 493/503 (solution)
  • HY-D0183
    ATP-polyamine-biotin
    3 Publications Verification

    Biochemical Assay Reagents Others
    ATP-polyamine-biotin, the first cell-permeable ATP analogue, is an efficient kinase cosubstrate. ATP-polyamine-biotin promotes biotin labeling of kinase substrates in live cells .
    ATP-polyamine-biotin
  • HY-D1570

    Fluorescent Dye Others
    BODIPYFL C12 is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells . Maximum excitation/emission wavelength: 480/508 nm .
    BODIPY FL C12
  • HY-D1445
    LysoSensor PDMPO
    1 Publications Verification

    Fluorescent Dye Metabolic Disease
    PDMPO, a lysosome pH indicator, is an excellent fluorescent acidotropic reagent for fluorescence imaging. PDMPO is a potent tool with which to study acidic organelles of live cells. PDMPO exhibits pH-dependent dual-excitation and dual-emission spectral peaks. PDMPO produces a blue fluorescence in weakly acidic organelles and shifts to yellow in more acidic lysosomes. (Abs=329 nm; Em=440/540 nm) .
    LysoSensor PDMPO
  • HY-D2381

    Fluorescent Dye Others
    AF 488 maleimide is a thiol-reactive dye used to label SH groups of proteins, which can attach the AF 488 fluorophore to cysteine residue-containing proteins and peptides as well as other thiolated molecules. AF 488 maleimide enables real-time visualization of dynamic pilus extension and retraction in live bacterial cells via epifluorescence microscopy (Ex/Em = 470/520 nm) .
    AF 488 maleimide
  • HY-D2355

    Biochemical Assay Reagents Others
    Tris-NTA Biotin is a biotin-labeled version of tris-NTA. Tris-NTA Biotin, as a bridge connecting His-tagged proteins with streptavidin, can reversibly label proteins and cell surfaces. Tris-NTA Biotin can be used in experiments such as protein immobilization, kinetic determination, live cell labeling, and Western blot detection .
    tris-NTA Biotin
  • HY-P10633

    Amino Acid Derivatives Others
    SmBiT Tag is an 11-amino-acid short peptide with extremely low natural affinity for LgBiT, with a Kd value of approximately 190 μM. It serves as a core component of the NanoLuc Binary Technology (NanoBiT) system. NanoBiT is a bioluminescent reporter system based on protein fragment complementation technology, which is used to monitor dynamic protein-protein interactions in live cells and in vitro .
    SmBiT Tag
  • HY-D0917

    DNA Stain Cancer
    NIR-Red Dead Cell-1 Dye is a DNA-binding fluorescent dye for non-living cells (Ex/Em=515 nm/531 nm). NIR-Red Dead Cell-1 Dye can intercalate into base pairs of double-stranded DNA and produce stronger fluorescence. NIR-Red Dead Cell-1 Dye is suitable for necrotic cells or late apoptotic cells with damaged cell membranes, showing green fluorescence under fluorescence microscopy or flow cytometry. NIR-Red Dead Cell-1 Dye can be used to distinguish live cells from dead cells and distinguish cell membrane integrity. NIR-Red Dead Cell-1 Dye can be attached to the surface of Feraheme (FH) nanoparticles (NPs) to obtain fluorescent dye-functionalized NPs for drug delivery studies .
    NIR-Red Dead Cell-1 Dye
  • HY-D1251

    Fluorescent Dye Others
    TRFS-red, a red fluorescence emission off-on probe, is selective for thioredoxin reductase (TrxR). TRFS-red exhibits high response rate and sensitivity. TRFS-red can be used for imaging live cells .
    TRFS-red
  • HY-D2348

    Fluorescent Dye Infection Others
    ACE is a low-background, photostable fluorophore with nanomolar binding affinity for the Okra RNA aptamer. ACE enables clear visualization of mRNA in live bacteria and mammalian cells, including tracking the trafficking of mRNA to stress granules and dual-color super-resolution imaging of RNA in live cells. (Ex=488 nm, Em=555 nm) .
    ACE
  • HY-D1353

    Fluorescent Dye Others
    LipidGreen 2 is a second generation small molecule probe for lipid imaging. LipidGreen 2 has a better fluorescence signal compared with the previous LipidGreen, and selectively stains neutral lipids in cells and fat deposits in live zebrafish .
    LipidGreen 2
  • HY-W013435

    Fluorescent Dye Others
    1,2-Diaminoanthraquinone is a sensitivity, specificity and nontoxic nitric oxide (NO) fluorescent probe. 1,2-Diaminoanthraquinone can be used to detect NO productions in live cell and animals with a maximum of absorption at about 540 nm and a detection limit of 5 μM for NO .
    1,2-Diaminoanthraquinone
  • HY-D1249

    Fluorescent Dye Others
    Calcein (mixture of isomers), Calcein (HY-D0040) Derivative, is a fluorescent dye (Ex/Em = 495/515 nm). Calcein (mixture of isomers) can be used for the researches for live cell staining, calcium ion detection, bone fluorescence labeling and membrane permeability leakage detection.
    Calcein (mixture of isomers)
  • HY-130015
    HKSOX-1 (5/6-mixture)
    2 Publications Verification

    Reactive Oxygen Species (ROS) Others
    HKSOX-1 (5/6-mixture) is a fluorescent probe which is used for imaging and detection of endogenous superoxide in live cells and in vivo. HKSOX-1 (5/6-mixture) exhibits excellent selectivity and sensitivity towards superoxide anion radical (Ex/Em = 509/534 nm) .
    HKSOX-1 (5/6-mixture)
  • HY-130017

    Reactive Oxygen Species (ROS) Others
    HKSOX-1r (5/6-mixture) is a fluorescent probe which is used for imaging and detection of endogenous superoxide in live cells and in vivo. HKSOX-1r (5/6-mixture) exhibits excellent selectivity and sensitivity towards superoxide anion radical .
    HKSOX-1r (5/6-mixture)
  • HY-100335
    PCI-33380
    1 Publications Verification

    Fluorescent Dye Btk Cancer
    PCI-33380 is a fluorescent probe ( (Ex=532 nm, Em=555 nm). PCI-33380 consists of a (BTK) inhibitor PCI-32765 (HY-10997) attaching with a Bodipy-FL fluorophore via a piperazine linker. PCI-33380 binds predominantly to Btk in B cell lysates with cell permeable activity. PCI-33380 can be used for imaging live cancer cells such as non-Hodgkin lymphoma research
    PCI-33380
  • HY-W784030

    Amino Acid Derivatives Biochemical Assay Reagents Fluorescent Dye Others
    N-TCO-L-lysine is a non-canonical amino acid. N-TCO-L-lysine contains a trans-cyclooctene (TCO) bioorthogonal reactive linker. N-TCO-L-lysine undergoes a bioorthogonal click reaction with SiR-Tz to enable fluorescent labeling of endogenously expressed proteins with site-specific incorporation. When used in combination with SiR-Tz, N-TCO-L-lysine allows super-resolution and live-cell imaging of endogenous proteins .
    N-TCO-L-lysine
  • HY-P3432

    Biochemical Assay Reagents Others
    DfTat is a dimer of the prototypical cell-penetrating peptide TAT. DfTat can deliver small molecules, peptides and proteins into live cells with a particularly high efficiency. DfTat labeled with the rhodamine can be used as a tracer for easy detection .
    DfTat
  • HY-131026

    JF635, SE; JF635, NHS

    Fluorescent Dye Others
    Janelia Fluor 635, SE (JF635, SE) is a red fluorogenic fluorescent dye containing an NHS ester that can be conjugated with primary amine groups. JF635, SE can be used for live cell 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® 635, SE
  • HY-DY1047

    DNA Stain Others
    DFHBI-1T (solution) is a membrane-permeable RNA aptamers-activated fluorescence probe (ex/em=472 nm/507 nm). DFHBI-1T binds to RNA aptamers (Spinach, Spinach2, iSpinach, and Broccoli) and causes specific fluorescence and lower background fluorescence. DFHBI-1T is used to image RNA in live cells .
    Solvent and concentration: DMSO: 20 mM
    DFHBI-1T (solution)
  • HY-D1250
    Mito-TRFS
    2 Publications Verification

    Fluorescent Dye Cancer
    Mito-TRFS, the first off-on probe, is used to image the mitochondrial thioredoxin reductase (TrxR2) in live cells .
    Mito-TRFS
  • HY-D1252
    Fast-TRFS
    2 Publications Verification

    Fluorescent Dye Others
    Fast-TRFS is a selective and superfast fluorogenic probe of thioredoxin reductase (TrxR). Fast-TRFS can be used for imaging TrxR activity in live cells .
    Fast-TRFS
  • HY-D0830

    Fluorexon tetraethyl ester

    Fluorescent Dye Others
    Calcein tetraethyl ester is a tetraethylated derivative of calcein, with its core function serving as a live cell-specific fluorescent tracer. Calcein tetraethyl ester can diffuse between human periodontal ligament cells via gap junctions, thus enabling the evaluation of gap junction intercellular communication function, and its diffusion is enhanced under hydrogen peroxide induction. Calcein tetraethyl ester can be applied in the fields of cell biology and fluorescent labeling .
    Calcein (tetraethyl ester)
  • HY-D1746
    EDTA-AM
    2 Publications Verification

    EDTA acetoxymethyl ester; Ethylenediaminetetraacetic acid acetoxymethyl ester

    Biochemical Assay Reagents Mitosis Others
    EDTA-AM (ethylenediaminetetraacetic acid, acetoxymethyl ester) is the membrane-permeant form of the metal chelator EDTA (HY-Y0682). Live cells passively load EDTA-AM by incubating with EDTA-AM. Once internalized, cytoplasmic esterase decomposes AM esters, releasing the active ligand EDTA, which isolates metal ions within the cell. EDTA-AM induces an arrest of mitotic progression and chromosome decondensation .
    EDTA-AM
  • HY-D1265
    EtS-DMAB
    2 Publications Verification

    HClO-green

    Fluorescent Dye Others
    EtS-DMAB (HClO-green) is a fluorescent probe, which can selectively detect hypochlorous acid (HOCl) (λex=440 nm, λem=610 nm). EtS-DMAB is applied to image exogenous and endogenous HOCl in live cells .
    EtS-DMAB
  • HY-D1256

    Fluorescent Dye Neurological Disease Metabolic Disease
    Msr-blue is a first turn-on fluorescent probe for methionine sulfoxide reductase with a more than 100-fold fluorescence increment. Msr-blue is used for monitoring the enzyme activity in live cells (λex=340 nm, λem=440 nm) .
    Msr-blue
  • HY-D1075

    HIDC

    Fluorescent Dye Others
    1,1',3,3,3',3'-Hexamethylindodicarbocyanine iodide is a carbocyanine dye that stains mitochondria of live cells.
    1,1',3,3,3',3'-Hexamethylindodicarbocyanine iodide
  • HY-125273

    Fluorescent Dye Phosphoglycerate Dehydrogenase (PHGDH) Others
    DNS-pE is a 3-phosphoglycerate dehydrogenase (PHGDH) inhibitor with a Ki of 7.4 μM. DNS-pE selectively and irreversibly covalently modifies endogenous PHGDH in live mammalian cells, its vinyl sulfone moiety acts as a fluorescence quencher that becomes highly fluorescent upon covalent modification of PHGDH. DNS-pE can be used as a fluorescent dye for live-cell imaging .
    DNS-pE
  • HY-136936

    Fluorescent Dye Others
    PYBG-BODIPY is a dye and has a role as a fluorochrome. PYBG-BODIPY specifically and efficiently labels the target genetically encoded SNAP-tags in live cells .
    PYBG-BODIPY
  • HY-D1255

    Fluorescent Dye Cancer
    Sel-green, a selective selenol fluorescent probe, is applied to quantify the Sec content in the selenoenzyme thioredoxin reductase and image endogenous Sec in live HepG2 cells .
    Sel-green
  • HY-119493

    Fluorescent Dye Others
    MSBN is a highly selective fluorogenic probe for thiols. MSBN can be used to image thiols in live cells selectively and specifically label protein thiols with a signal to determine various reversible protein thiol modifications .
    MSBN
  • HY-110251A

    DNA Stain Others
    DFHBI-2T is a membrane-permeable RNA aptamers-activated fluorescence probe (ex/em=500 nm/523 nm). DFHBI-2T is used to image RNA in live cells .
    DFHBI-2T
  • HY-118667
    Dehydroergosterol
    1 Publications Verification

    Liposome Others
    Dehydroergosterolis a naturally occurring fluorescent sterol analog (Ex/Em=325/375 nm), which mimics the properties of cholesterol in cell membranes. DehydroergosterolEasily conjugated by cholesterol-binding proteins for real-time imaging in live cells. DehydroergosterolThe sterol environment and intracellular sterol transport in vivo can be probed/elucidated in real time .
    Dehydroergosterol
  • HY-162161

    Fluorescent Dye Microtubule/Tubulin Cancer
    Flutax-2 is an active fluorescent derivative of Paclitaxel (HY-B0015) that binds to polymerized αβ-tubulin dimers. Flutax-2 is applicable for imaging microtubules in live cells, isolated cytoskeletons and parasites (Ex/Em=496/526 nm) .
    Flutax-2
  • HY-W053709

    (4-(1,2,4,5-Tetrazin-3-yl)phenyl)methanamine; Tetrazine-NH2

    MOFs Cancer
    Tetrazine-Amine ((4-(1,2,4,5-Tetrazin-3-yl)phenyl)methanamine) is a tetrazine linker that can be used to covalently label live cells through a cycloaddition . Tetrazine-Amine is a click chemistry reagent, it contains a Tetrazine group that can undergo an inverse electron demand Diels-Alder reaction (iEDDA) with molecules containing TCO groups.
    Tetrazine-Amine
  • HY-130736

    JF549, SE; JF549, NHS

    Fluorescent Dye Others
    Janelia Fluor® 549, SE (JF549, SE) is a cell-permeable fluorescent dye with an NHS ester (succinimidyl ester (SE)) reactive group. NHS esters react with primary amines and are commonly used to conjugate dyes to proteins, antibodies, amine-modified oligonucleotides, and other molecules. Janelia Fluor® 549, SE also acts as a ligand for self-labeling tags such as HaloTag and SNAP-tag, and can be used in live-cell imaging studies (Ex/Em = 549 nm/571 nm) .\n


    Janelia Fluor® 549, SE

Inquiry Online

Your information is safe with us. * Required Fields.

Salutation

 

Country or Region *

Applicant Name *

 

Organization Name *

Department *

     

Email Address *

 

Product Name *

Cat. No.

 

Requested quantity *

Phone Number *

     

Remarks

Inquiry Online

Inquiry Information

Product Name:
Cat. No.:
Quantity:
MCE Japan Authorized Agent: