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633 résultats pour Enzymes

You searched for: Enzymes

Enzymes

Les enzymes accélèrent les réactions chimiques et sont reconnus pour catalyser plus de 5000 types de réactions. La plupart sont des protéines, quelques-unes sont des molécules d’ARN catalytiques.

Choisissez des enzymes pour séparer des liaisons, éliminer de l’ADN génomique à partir de préparations d’ARN, produire des fragments de protéines ou pour une utilisation en chromatographie d’échange d’ions. Les enzymes sont utilisées dans l’industrie chimique et autres applications industrielles lorsque des catalyseurs très spécifiques sont nécessaires.

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Pig Pepsin (from Stomach mucosa), MP Biomedicals

Supplier: MP Biomedicals

Pepsin is an acid protease, contains a proteolytic enzyme. It contains the "cathepsin" component which has milk curdling activity. It has a broad range of substrate activity and demonstrates an esterase acitivity. It generally attacks peptide bonds.

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Bacillus cereus beta-Lactamase, MP Biomedicals

Supplier: MP Biomedicals

Activity: Each vial contains 500 units β-Lactamase I and 50 units β-Lactamase II Unit Definition: One unit is defined as the amount of enzyme which will hydrolyse 1,0 micromole of benzyl penicillin and 1,0 micromole of cephalosporin C per minute at 25 °C in the presence of EDTA pH 7,0.

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Helix pomatia beta-Glucuronidase, MP Biomedicals

Supplier: MP Biomedicals

Beta-glucuronidases are members of the glycosidase family of enzymes that catalyse breakdown of complex carbohydrates. Human β-glucuronidase is a type of glucuronidase that catalyses hydrolysis of β-D-glucuronic acid residues from the non-reducing end of mucopolysaccharides, such as heparan sulfate. In human gut β-glucuronidase converts conjugated bilirubin to the unconjugated form for reabsorption.

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Clostridium histolyticum Collagenase type IV (from Clostridium histolyticum), MP Biomedicals

Supplier: MP Biomedicals

Activators: Ca²⁺ is required. Inhibitors: Metal chelating agents such as cysteine, EDTA or o-phenanthroline but not DFP. It is also inhibited by a2-macroglobulin - a large plasma glycoprotein. The human skin enzyme is inhibited by human serum but granulocyte collagenase is not. Human serum contains a2-macroglobulin and a1-antitrypsin that may inhibit certain collagenases.

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Peroxidase, MP Biomedicals

Supplier: MP Biomedicals

HRP is a plant glycohemoprotein belongs to the ferroprotoporphyrin group of peroxidases. It is used in biochemistry applications such as western blots, ELISA and Immunohistochemistry. It is used to amplify a weak signal and increase detectability of a target molecule, such as a protein. HRP labeled immunoglobulins are used as probes for the demonstration of tissue antigens and in enzyme immunoassay (EIA) systems for determination of soluble and insoluble antigens.

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Streptomyces hyalurolyticus hyaluronidase, MP Biomedicals

Supplier: MP Biomedicals

The hyaluronidase is purified from Streptomyces hyalurolyticus. This enzyme belongs to the endo-beta-hexosaminidase and endo-eliminase type enzyme that produces oligo-saccharide (unsaturated tetraose and pentose) by hydrolysing the beta-1,4-linkage of hyaluronic acid. It is stable in both high temperature and acid or alkaline range. It has high substrate specificity and hydrolyzes hyaluronic acid only in mucopolysaccharide.

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Peroxidase, MP Biomedicals

Supplier: MP Biomedicals

Soluble in distilled water. Soluble in 0,1 M potassium phosphate buffer, pH 6,0 (monobasic potassium phosphate adjusted to pH 6,0 with 1,0 M potassium hydroxide) (10 mg/ml yields a clear, red-brown solution). Solutions of HRP can be kept refrigerated for up to a year while maintaining practically undiminished activity. Optimal pH is 6,0 to 6,5 (activity at pH 7,5 is 84% of the maximum). The enzyme is most stable in the pH range of 5,0 to 9,0 (Lit.).

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Neuraminidase, MP Biomedicals

Supplier: MP Biomedicals

Neuraminidase (Sialidase: Acylneuraminyl hydrolase; EC 3.2.1.18) From Arthrobacter ureafaciens lyophilised powder with salts. The salts are composed of sodium-potassium phosphate to give a solution of 10 mM phosphate buffer (pH 7) when enzyme is reconstituted with water to make activity of 1 unit per ml. Activity: >60 units/mg protein for NAN-lactose >25 units/mg protein for bovine submaxillary mucin >20 units/mg protein for colominic acid Protein is determined by the method of Lowry et al. with bovine albumin as a standard.6 Unit definition: One unit will liberate 1,0 µmole of N-acetyl-neuraminic acid (NANA) per minute at pH 5,0 at 37 °C, using either one NAN-lactose, bovine submaxillary mucin, or colominic acid as a substrate.

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Tritirachium album proteinase K, MP Biomedicals

Supplier: MP Biomedicals

Proteinase K is a highly active stable endopeptidase with a broad spectrum of action was isolated by E. Merk's Darmstadt Biochemical Research Department in 1970 from a culture filtrate of the fungus, Tritirachium album Limber. This fungus is able to grow on Keratin (e.g., wool, horn particles) as the sole source of carbon and nitrogen. The isolated protease was, therefore, given the K designation.
Proteinase K is a stable and highly reactive serine protease. Evidence from crystal and molecular structure studies indicates the enzyme belongs to the subtilisin family with an active-site catalytic triad (Asp39-His69-Ser224). It is stable in a broad range of environments: pH, buffer salts, detergents (SDS), and temperature. In the presence of 0,1 to 0,5% SDS, proteinase K retains activity and will digest a variety of proteins and nucleases in DNA preparations without compromising the integrity of the isolated DNA.

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Hyaluronidase, MP Biomedicals

Supplier: MP Biomedicals

Unit Definition: Enzyme activity is determined by a change in optical density in a solution of hyaluronic acid. Activity is compared to a hyaluronidase International Standard and is expressed as an International Unit (U).

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Staphylococcus aureus Staphylokinase

Supplier: Abnova

Staphylococcus aureus Staphylokinase

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Recombinant mRNA Cap 2'-O-methyltransferase (from E. coli)

Supplier: Abnova

Recombinant mRNA Cap 2'-O-methyltransferase (from E. coli)

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Perfringolysine O, recombinante, Clostridium perfringens, aa29-500, His-Tag (PFO)

Supplier: US Biological

Perfringolysine O, recombinante, Clostridium perfringens, aa29-500, His-Tag (PFO)

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Amylase, MP Biomedicals

Supplier: MP Biomedicals

The number of grams of soluble starch dextrinized in the presence of excess B-amylase per hour at 40 °C, pH 5,0.

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L-Glutamic dehydrogenase, MP Biomedicals

Supplier: MP Biomedicals

For Continuous Spectrophotometric Rate determination method: 0,3 to 0,6 unit/ml of L-Glutamic dehydrogenase in cold Triethanolamine buffer.

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Protocatechuate-3,4-dioxygenase, MP Biomedicals

Supplier: MP Biomedicals

Inhibitors : Ag⁺, Hg²⁺, PCMB; Optimum temperature: 60 to 65 °C; Thermal stability: below 50 °C (pH 6,0; 1 h).

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alpha-Chymotrypsin, MP Biomedicals

Supplier: MP Biomedicals

One unit will hydrolyse 1,0 µmole of N-benzoyl-L-tyrosine ethyl ester (BTEE) per minute at pH 7,8 and 25 °C in the presence of ionised calcium.

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Lipase, MP Biomedicals

Supplier: MP Biomedicals

One USP unit of lipase activity is contained in the amount of pancreatin that liberates 1,0 µEq of acid per minute at a pH of 9,0 at 37 °C under the conditions of the assay for lipase activity.

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Papain

Papain

Supplier: Thermo Fisher Scientific

CAS No.: 9001-73-4

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Myrothecium sp. Bilirubin oxidase, MP Biomedicals

Supplier: MP Biomedicals

Myrothecium sp. Bilirubin oxidase

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Recombinant Poly(A) Polymerase (from E. coli)

Supplier: Abnova

Recombinant Poly(A) Polymerase (from E. coli)

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Sheep Hyaluronidase (from Testes), MP Biomedicals

Supplier: MP Biomedicals

Hyaluronidase is a glycoprotein containing 5% mannose and 2,17% glucosamine, it catalyzes the random hydrolysis of 1,4-linkages between 2-acetamido- 2-deoxy- b-D-glucose and D-glucose residues in hyaluronate. It is a tetramer consisting of 4 equal subunits with a molecular mass of 14 kDa each.

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Fig tree Ficin, MP Biomedicals

Supplier: MP Biomedicals

Fig tree Ficin

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Recombinant mRNA Cap 2'-O-methyltransferase (from E. coli)

Supplier: Abnova

Recombinant mRNA Cap 2'-O-methyltransferase (from E. coli)

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Synthetic Yeast Inorganic Pyrophosphatase (from E. coli)

Supplier: Abnova

Synthetic Yeast Inorganic Pyrophosphatase (from E. coli)

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Microbe creatinine deiminase, MP Biomedicals

Supplier: MP Biomedicals

Creatinine deiminase has been used in a study to assess the application of a creatinine-sensitive biosensor for hemodialysis control. It has also been used in a study to investigate the bioelectronic tongue for the simultaneous determination of urea, creatinine and alkaline ions in clinical samples.

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Bovine hyaluronidase (from Testes), MP Biomedicals

Bovine hyaluronidase (from Testes), MP Biomedicals

Supplier: MP Biomedicals

Hyaluronidase is a glycoprotein containing 5% mannose and 2,17% glucosamine, it catalyses the random hydrolysis of 1,4-linkages between 2-acetamido- 2-deoxy- b-D-glucose and D-glucose residues in hyaluronate. Hyaluronidase from bovine testes is a tetramer consisting of 4 equal subunits with a molecular mass of 14 kDa each.

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Streptococcus sp. glycerol-3-phosphate oxidase, MP Biomedicals

Supplier: MP Biomedicals

Glycerol-3-phosphate oxidase has been used for sensitive metabolite assays of starch and lipid synthesis, pyrophosphate, ATP, ADP, and most glycolytic intermediates in Arabidopsis seeds. It is a part of the dihydroxyacetone phosphate:glycerol-3-phosphate cycle in the bloodstream form of Trypanosoma brucei.

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Tritirachium album proteinase K, MP Biomedicals

Supplier: MP Biomedicals

Suitable for both protein and nucleic acid isolation. Exhibits proteolytic activity on proteins, peptides, glycoproteins, amides and esters. Also active with nitroanilides of amino acids with protected amino groups, excluding arginine. Useful in the isolation of DNA and RNA, in the analysis of membrane structures and protein structure. Proteolytic activity: >30mAnson Units/mg Unit definition: One Anson unit is the amount of enzyme which liberates 1 µmol of Folin-positive amino acids per minute at pH 7,5 and 35 °C, using hemoglobin as substrate.

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Pepsin

Supplier: Thermo Fisher Scientific

Contains either Lactose or Maltodextrin excipient

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