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Catalase

Catalase is an essential enzyme found in most living organisms that plays a critical role in the decomposition of hydrogen peroxide, converting it into water and oxygen.
This antioxidant enzyme helps protect cells from the damaging effects of reactive oxygen species.
Catalase is involved in a variety of biological processes and has been extensively studied for its potential therapeutic applications in areas such as oxidative stress management and tissue regeneration.
Researchers can utilize PubCompare.ai's AI-driven platform to streamline their catalase research by locating and comparing protocols from literature, pre-prints, and patents, enhancing reproducibility and accuracy.
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Most cited protocols related to «Catalase»

BS-C-1 cells (ATCC) were fixed, immunostained with rabbit anti-Tom20 (Santa Cruz Biotech) and/or mouse anti-β-tubulin (TUB2.1, Cytoskeleton) (See Supplementary Methods online for the detailed immunostaining procedure). The stained cells were imaged in PBS with the addition of 100 mM mercaptoethylamine at pH 8.5, 5% glucose (w/v) and oxygen scavenging enzymes (0.5 mg/mL glucose oxidase (Sigma-Aldrich), and 40 μg/mL catalase (Roche Applied Science)), unless otherwise mentioned. This above imaging buffer has a refractive index of 1.34. Media with higher refractive index (1.45) based on 80% (v/v) glycerol and 5% (w/v) glucose, or 60% (w/w) sucrose solution and 5% (w/w) glucose, were used in some experiments, both with the same amount of mercaptoethylamine and oxygen scavenging enzymes as described above. The slight mismatch between the medium refractive index and coverglass is needed for focus locking during imaging. Although a high concentration of mercaptoethylamine and oxygen scavenging system were used here for fixed cell imaging, the cyanine dyes also switch in buffers with lower concentrations of thiol and oxygen scavenger system compatible with live cell imaging12 (link).
Data acquisition was performed on a fluorescence microscope as described in the Supplementary Methods online. Specifically for 3D imaging, a cylindrical lens with a focal length of 1 m was inserted into the imaging optical path for 3D localization8 (link). To stabilize the microscope focusing during data acquisition, the reflected excitation laser from the coverglass-medium interface was directed to a quadrant photodiode. The position read out of the quadrant photodiode, which was sensitive to the distance between the coverglass and the objective focal plane, was used to provide feedback to a piezo objective positioner (Nano-F100, MadCity Labs), allowing compensation for the focus drift. The residual drift, < 40 nm (Supplementary Fig. 7 online), was corrected during data analysis. For whole cell imaging in an aqueous medium, the objective positioner was stepped in 300 nm intervals, which corresponds to a focal plane displacement of 216 nm after correcting for the refractive index mismatch at the glass-medium interface. Molecules within 270 nm below the focal plane were accepted for image reconstruction. Whole cell images were obtained from 9 partially overlapped z-slices. For imaging in media with a refractive index of 1.45, the positioner was stepped in 650 nm intervals, corresponding to an actual focal plane displacement of 580 nm. Molecules within 360 nm above and below the focal plane are accepted and whole cell images were obtained from 4 partially overlapped z-slices.
For single color imaging, the A405-Cy5 labeled sample was continuously illuminated with a 657 nm imaging laser (~30 mW). A low intensity 405 nm laser was used to activate the probes, with intensity adjusted such that only an optically resolved subset of the probes were activated at any given time. In certain cases, the 405 nm laser can be omitted because the 657 nm laser can also activate Cy5, albeit at a low rate. Emission from the fluorophores were recorded by the camera at a frame rate of 20 Hz. 3D localization of individual molecules was performed as described previously8 (link) and described in the Supplementary Methods online. Multicolor imaging was performed by illuminating the sample repetitively with each frame of an activation laser followed by 3 frames of the 657 nm imaging laser. An alternating sequence of two activation lasers was used for two-color imaging. The 405 nm, 460 nm and 532 nm lasers were used to activated A405-Cy5, A488-Cy5, and A555-Cy5, respectively. Subtraction of crosstalk between different color channels were performed during data analysis as described in the Supplementary Methods online.
Publication 2008
A-A-1 antibiotic Buffers Catalase Cells Cross Reactions Cysteamine Cytoskeleton Dyes Enzymes Gas Scavengers Glucose Glycerin Lens, Crystalline Microscopy Microscopy, Fluorescence Mus Oxidase, Glucose Oxygen Rabbits Reading Frames Sucrose Sulfhydryl Compounds Tubulin
The MLST scheme used to characterize Listeria strains is based on the sequence analysis of the following seven housekeeping genes: acbZ (ABC transporter), bglA (beta-glucosidase), cat (catalase), dapE (Succinyl diaminopimelate desuccinylase), dat (D-amino acid aminotransferase), ldh (lactate deshydrogenase), and lhkA (histidine kinase). This MLST scheme was adapted from the MLST system proposed by Salcedo and colleagues [14] (link), with the following modifications. First, the template for gene ldh was extended from 354 to 453 nucleotides, thus improving strain discrimination. Second, gene templates were shortened because the extremities of the previous templates correspond to parts of the PCR primer sequences, thus possibly not corresponding totally to the genomic sequence of the isolates analyzed. Third, we incorporated universal sequencing tails to the PCR primers (Table 1), which allows to sequence PCR fragments of all genes using only two primers. DNA extraction was performed by the boiling method [41] (link). The PCR amplification conditions were as follows: an initial cycle of 94°C for 4 min; 25 amplification cycles, each consisting of 94°C for 30 s, 52°C for 30 s (except for bglA which has an annealing temperature of 45°C), and 72°C for 2 min; and a final incubation at 72°C for 10 min. The PCR products were purified by ultrafiltration (Millipore, France) and were sequenced on both strands with Big Dye v.1.1 chemistry on an ABI3730XL sequencer (Applied BioSystems).
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Publication 2008
1,2-diarachidonoyl-glycero-3-phosphoethanolamine Amino Acids ATP-Binding Cassette Transporters beta-Glucosidase Catalase Discrimination, Psychology Genes Genes, Housekeeping Genetic Template Genome Histidine Kinase Lactate Listeria Nucleotides Oligonucleotide Primers Strains succinyldiaminopimelate desuccinylase Tail Transaminases Ultrafiltration

M. smegmatis mc2155 [72] (link), M. tuberculosis H37Rv and Escherichia coli NEB-10β (New England Biolabs UK Ltd) were used in this work. M. smegmatis and M. tuberculosis were grown on Middlebrook 7H11 agar medium (BD Diagnostics) supplemented with 0.5% glycerol and 10% oleic acid albumin-dextrose-catalase (OADC) (BD Diagnostics). When required, filter-sterilised luciferin was added at a final concentration of 0.157 mM. Liquid cultures of M. smegmatis and M. tuberculosis were grown either in Middlebrook 7H9 broth (BD Diagnostics) containing 0.05% Tween 80 (Sigma) and 10% albumin-dextrose-catalase (ADC) enrichment (BD Diagnostics), or (for M. smegmatis Gluc assays) in Luria-Bertani (LB) medium with 0.05% Tween. LB medium was preferred for the Gluc assays because the background of coelenterazine was 100 times lower in that medium than in 7H9 broth. LB medium was used for culturing E. coli. All the strains were grown at 37°C. The following antibiotics were added when appropriate: ampicillin [100 µg ml−1 (Sigma)], hygromycin B [150 µg ml−1 (Invitrogen)] and kanamycin [25 µg ml−1, for mycobacteria, 50 µg ml−1 for E. coli (Sigma)].
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Publication 2010
Agar Albumins Ampicillin Antibiotics, Antitubercular Biological Assay Catalase coelenterazine Diagnosis Escherichia coli Glucose Glycerin Hygromycin B Kanamycin Luciferins Mycobacterium Mycobacterium tuberculosis Mycobacterium tuberculosis H37Rv Oleic Acid Strains Tween 80 Tweens
Multi-angle light scattering (MALS) studies were performed inline with size-exclusion chromatography on protein and RNA samples to assess monodispersity and mass of the SAXS samples using an 18-angle DAWN HELEOS light scattering (LS) detector in which detector 12 was replaced with a DynaPro quasi-elastic light scattering detector (Wyatt Technology). Simultaneous concentration measurements were made with an Optilab rEX refractive index detector (Wyatt Technology) connected in tandem to the LS detector. For each buffer used, the MALS system was calibrated with BSA at 10 mg/mL to determine delay times and band broadening. For proteins, BSA, xylanase and glucose isomerase provided an additional calibration of the refractive index increment for protein samples. For RNA samples, the refractive index increment was determined from P4–P6 RNA samples10 (link), 30 (link).
MALS analyses were performed on all the RNAs (except tRNAphe) in this study and a set of proteins comprising glucose isomerase, xylanase, thermosome, catalase, TBL1, PYR1, and p65 (Table S1 and S2).
Publication 2013
AN 12 Buffers Catalase Gel Chromatography glucose isomerase Light Phenylalanine-Specific tRNA Proteins RNA SET protein, human Thermosomes
Super-resolution imaging experiments were performed on live samples (Fig. 2j, Supplementary Fig. 2c, Supplementary Fig. 4d, Supplementary Fig. 4g) and fixed cells (Fig. 1i, Fig. 2b, Supplementary Fig. 2a, Supplementary Fig. 4a). For live-cell dSTORM imaging the cells were labeled, washed, and imaged directly in DMEM–FBS. For fixed cell preparations, cells were labeled, washed, and fixed in 4% paraformaldehyde (Electron Microscopy Sciences) in PBS buffer (pH = 7.5). The cells were imaged in a sealed cell chamber (Life Technologies) containing nitrogen-degassed redox buffer consisting of PBS supplemented with 50 mM mercaptoethylamine (Sigma–Aldrich), 10% w/v glucose, 0.5 mg/mL glucose oxidase (Sigma–Aldrich), and 28400 U/mL catalase (Sigma–Aldrich). Before imaging, JF549 could be efficiently “shelved” in a dark state upon illumination with 2 kW·cm−2 of excitation light (561 nm), and then activated back to a fluorescent state by blue light (405 nm) with low intensity (~20·W cm−2). JF646 fluorophores were converted into a predominately dark state using continuous illumination of 637 nm excitation light at 14 kW·cm−2, after which individual rapidly blinking molecules of JF646 fluorophores were observed. These experiments were conducted on the two wide-field microscope systems described above: the Nikon Eclipse Ti epifluorescence microscope (Fig. 1i, Fig. 2j, Supplementary Fig. 2a, Supplementary Fig. 2c, Supplementary Fig. 4g), and the custom-built three-camera microscope with an ASI RAMM frame (Fig. 2b, Supplementary Fig. 4a, Supplementary Fig. 4d).
Publication 2014
Buffers Catalase Cells Cysteamine Electron Microscopy Glucose Light Microscopy Nitrogen Oxidase, Glucose Oxidation-Reduction paraform Reading Frames

Most recents protocols related to «Catalase»

In plasma samples, the following oxidative stress markers were measured: nitrite (NO2), superoxide anion radical (O2), hydrogen peroxide (H2O2), and the index of lipid peroxidation (measured as TBARS – thiobarbituric acid reactive substances).
Nitric oxide decomposes rapidly to form stable metabolite nitrite/nitrate products. The nitrite level was measured and used as an index of nitric oxide (NO) production using the Griess reagent. A total of 0.5 ml of plasma was precipitated with 200 μl of 30% sulphosalicylic acid, vortexed for 30 min, and centrifuged at 3000 × g. Equal volumes of supernatant and Griess reagent containing 1% sulphanilamide in 5% phosphoric acid/0.1% naphthalene ethylenediamine dihydrochloride were added and incubated for 10 min in the dark, and the sample was measured at 543 nm. The nitrite levels were calculated using sodium nitrite as the standard [13 (link)].
The O2 concentration was measured after the reaction of nitro blue tetrazolium in Tris buffer with the plasma at 530 nm. Distilled water served as the blank [14 ].
The measurement of H2O2 is based on the oxidation of phenol red by H2O2 in a reaction catalysed by horseradish peroxidase (HRPO). Two hundred μl of plasma was precipitated with 800 ml of freshly prepared phenol red solution, followed by the addition of 10 μl of (1:20) HRPO (made ex tempore). Distilled water was used as the blank instead of the plasma sample. H2O2 was measured at 610 nm [15 (link)].
The degree of lipid peroxidation in the plasma samples was estimated by measuring TBARS using 1% thiobarbituric acid in 0.05 NaOH, incubated with the plasma at 100 °C for 15 min, and measured at 530 nm. Distilled water served as the blank [16 (link)].
The activity of the following antioxidants in the lysate was determined: reduced glutathione (GSH), catalase (CAT), and superoxide dismutase (SOD). The level of reduced glutathione was determined based on GSH oxidation with 5,5-dithiobis-6,2-nitrobenzoic acid using a method by Beutler [17 ]. The CAT activity was determined according to Aebi [18 (link)]. The lysates were diluted with distilled water (1:7 v/v) and treated with chloroform-ethanol (0.6:1 v/v) to remove haemoglobin, and then 50 μl of CAT buffer, 100 μl of sample and 1 ml of 10 mM H2O2 were added to the samples. The detection was performed at 360 nm. SOD activity was determined by the epinephrine method of Beutler [19 (link)]. Lysate (100 μl) and 1 ml carbonate buffer were mixed, and then 100 μl of epinephrine was added. The detection was performed at 470 nm.
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Publication 2023
Anions Antioxidant Activity Buffers Carbonates Catalase Chloroform Epinephrine Ethanol ethylenediamine dihydrochloride Griess reagent Hemoglobin Horseradish Peroxidase Lipid Peroxidation naphthalene Nitrates Nitrites Nitrobenzoic Acids Nitroblue Tetrazolium Oxidative Stress Oxide, Nitric Peroxide, Hydrogen Phosphoric Acids Plasma Reduced Glutathione Sodium Nitrite Sulfanilamide sulfosalicylic acid Superoxide Dismutase Superoxides thiobarbituric acid Thiobarbituric Acid Reactive Substances Tromethamine
This study was conducted in Damietta Governorate on the Egyptian Mediterranean coast (northern east Nile Delta), Egypt through the period from October 2021 to March 2022. A total of 200 cloacal swabs were collected from migratory and broiler chicken birds. Broiler chickens were selected from poultry farms and live bird markets near which the migratory birds were hunted at the similar time points. One hundred samples were obtained from migratory birds and 100 from broiler chickens; 50 from 5 poultry farms (10 for each farm) with deep litter system and 50 from 3 live bird markets located in different regions inside Damietta Governorate. Five broiler poultry farms were chosen on the basis of their owners’ willingness to permit the samples collection. Broiler chicken birds from the farms and live bird markets were selected randomly. The map of Damietta Governorate was constructed to highlight the location of the selected broiler chicken farms and live bird markets in relation to the rest of Damietta (Supplementary Fig. 9). The migratory birds that were found near to the examined farms and live bird markets were trapped by net traps, sampled, marked (to ensure that each bird was only sampled once) and photographed to detect its species. The cotton swabs were aseptically collected on 2 ml of Bolton broth (Oxoid, UK) then labeled and transported within 1 h in an ice box at 4 °C to the Reference Laboratory for Veterinary Quality control on Poultry production to perform further examinations. All samples were incubated at 42 °C for 48 h under microaerophilic conditions. Isolation and identification of Campylobacter spp.
Each enriched sample was streaked onto modified charcoal cefoperazone deoxycholate agar (Oxoid, UK) with antibiotic solution (cefoperazone sodium salt; 0.032 g, amphotericin B; 0.01 g and water; 5 ml) and incubated at 42 °C for 48 h. The suspected colonies were identified by morphological characteristics and Gram staining [45 ]. The suspected isolates were subjected to standard biochemical procedures, including tests for hippurate, acetate hydrolysis and catalase [46 ].
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Publication 2023
Acetate Agar Amphotericin B Antibiotics Aves Campylobacter Catalase Cefoperazone Charcoal Chickens Deoxycholate Enterobacter Fowls, Domestic Gossypium Hartnup Disease hippurate Hydrolysis isolation Physical Examination Sodium, Cefoperazone Specimen Collection
The concentration of malondialdehyde (MDA) as a marker of oxidative stress and the levels of total antioxidant capacity (TAC), catalase (CAT) and superoxide dismutase (SOD) activity were measured using commercial kits and according to the manufacturer’s protocol (Kiazist, Iran). Briefly, kidney tissues were homogenized in lysis buffer containing protease inhibitors (Sigma–Aldrich, USA). After centrifugation by a 3-18KS Sigma centrifuge (Sigma, Germany), supernatants were collected for next analysis. MDA level was quantified by measuring thiobarbituric acid reactive substances produced in the reaction of MDA with thiobarbituric acid. TAC level was measured based on the capacity to convert Cu2+ to Cu+ ion. The activity of catalase was determined according to the reaction of the enzyme with methanol in the presence of hydrogen peroxide and measurement of generated formaldehyde. SOD activity was assayed by measuring the dismutation of superoxide radicals generated by the xanthine/xanthine oxidase system. Protein concentration of lysates was measured using Bradford method. Then the levels of oxidative stress markers were normalized to protein content [20 (link), 21 (link)].
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Publication 2023
Antioxidants Buffers Catalase Centrifugation Enzymes Formaldehyde Kidney Malondialdehyde Methanol Oxidative Stress Peroxide, Hydrogen Protease Inhibitors Proteins Superoxide Dismutase Superoxides thiobarbituric acid Thiobarbituric Acid Reactive Substances Tissues Xanthine Oxidase

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Publication 2023
Catalase Cells Cortex, Cerebral Cultured Cells Fluorescence Mus
Bacteria were cultured to OD600 1.0 using TSB medium, and 1 ml of culture was collected by centrifugation and washed twice with PBS. The cultures were incubated in PBS with or without 0.4 mM H2O2 for 30 min. The reaction samples were collected by centrifugation, washed twice with PBS, and broken by Ultrasonic Cell Disruptor (Xinzhi, Ningbo, China). Catalase activity was detected using a catalase assay kit (Beyotime, Shanghai, China).
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Publication 2023
Bacteria Biological Assay Catalase Cells Centrifugation Peroxide, Hydrogen Ultrasonics

Top products related to «Catalase»

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Catalase is a common enzyme found in the cells of most living organisms. It functions as a catalyst, accelerating the decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2).
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Tween 80 is a non-ionic surfactant and emulsifier. It is a viscous, yellow liquid that is commonly used in laboratory settings to solubilize and stabilize various compounds and formulations.
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Glucose oxidase is an enzyme that catalyzes the oxidation of glucose to gluconic acid and hydrogen peroxide. It is commonly used in various laboratory applications, such as the detection and measurement of glucose levels in biological samples.
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Middlebrook 7H9 broth is a type of culture media used for the growth and maintenance of mycobacteria, such as Mycobacterium tuberculosis. It provides essential nutrients and growth factors required by these bacteria.
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The Catalase Assay Kit is a laboratory tool used to measure the activity of the enzyme catalase. Catalase is an important antioxidant enzyme found in living organisms that helps break down hydrogen peroxide into water and oxygen. The kit provides the necessary reagents and protocols to quantify catalase levels in various sample types.
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Fetal Bovine Serum (FBS) is a cell culture supplement derived from the blood of bovine fetuses. FBS provides a source of proteins, growth factors, and other components that support the growth and maintenance of various cell types in in vitro cell culture applications.
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Glycerol is a colorless, odorless, and viscous liquid used in various laboratory applications. It is a basic chemical compound with the molecular formula C₃H₈O₃. Glycerol is commonly used as a solvent, humectant, and stabilizer in many laboratory procedures.
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Catalase from bovine liver is an enzyme that catalyzes the decomposition of hydrogen peroxide to water and oxygen. It is a heme-containing enzyme found in the peroxisomes of most aerobic cells.
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The Catalase Assay Kit is a lab equipment product designed to measure the activity of the enzyme catalase. Catalase is an important antioxidant enzyme that helps break down hydrogen peroxide, a harmful byproduct of cellular metabolism. The kit provides reagents and protocols to quantify catalase levels in various biological samples.
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Middlebrook 7H9 medium is a nutrient-rich growth medium used for the cultivation of mycobacteria, including Mycobacterium tuberculosis. It provides the necessary nutrients and supplements to support the growth of these bacteria in a laboratory setting.

More about "Catalase"

Catalase is a crucial enzyme found in most living organisms, playing a vital role in the decomposition of hydrogen peroxide into water and oxygen.
This antioxidant enzyme helps protect cells from the damaging effects of reactive oxygen species, making it a key player in various biological processes.
Researchers can leverage AI-driven platforms like PubCompare.ai to streamline their catalase research, locating and comparing protocols from literature, preprints, and patents to enhance reproducibility and accuracy.
The intelligent comparison tools offered by PubCompare.ai can help identify the best protocols and products to optimize catalase-related studies, including those involving Tween 80, Glucose oxidase, Middlebrook 7H9 broth, Catalase Assay Kit, FBS, Glycerol, and Catalase from bovine liver.
By utilizing these advanced tools, researchers can experience the power of AI-driven research optimization and take their catalase investigations to new heights.
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