Enzymes-Enzymes
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2012年4月19日星期四
Supply High Quality Defibrase at Cheaper Price
Product name:Defibrase
Description of Defibrase:
With an arginine activity, quickly hydrolyzes BAEE. Belonging to serine proteinase, specifically hydrolyzes Arg-X bond of fibrinogen α chain, releases A peptide, and converts to fibrin. All fibrins bind with each other to end. In vivo, defibrase does not activate coagulation factor XIII, therefore fibrin polymer will not cross-link, or form a dissolvable micro-coagulum (easily to be depredated by plasmin).
Source: Agkistrodon halys or Agkistrodon acutus venin
Storage:Store in an airtight container, protect from light, at a temperature of less than 10°C.
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2012年4月16日星期一
Horseradish Peroxidase Seller
Product name:Horseradish Peroxidase
Description of Horseradish Peroxidase:
Horseradish Peroxidase uses hydrogen peroxide to oxidize both organic and inorganic compounds.1 Horseradish peroxidase along with other heme peroxidases are brightly colored especially under the near-ultraviolet light.2 This property of heme peroxidases make them useful for attaching to “transparent” proteins so that they can be seen under different wavelengths. The heme group that is in horseradish peroxidase is simpler than those in mammalians and therefore makes it an excellent starting point in the in-depth study of heme peroxidases and their functions.2 It has been found that horseradish peroxidase when combined with other compounds is highly reactive toward human tumor cells. A better understanding of horseradish peroxidase could lead to a new targeted cancer therapy.
Horseradish Peroxidase (HRP), a plant glycoprotein with a molecular weight of 40,000 D and a molecular radius (ae) of 30 A, has been modified chemically to prepare tracer molecules with different molecular charge. Modification of free carboxyl groups on the enzyme is achieved by carbodiimide activation and subsequent reaction of activated carboxyl groups with a nucleophile; uncharged groups or radicals containing additional positively charged moieties are introduced into the protein molecule resulting in an increased net positive charge of the tracer. Amino groups in the protein molecule are modified by acetylation or succinylation; this reaction will increase the net negative charge of the enzyme by either introducing an uncharged group or an additional carboxyl radical. The tracer molecules so obtained are then characterized in terms of molecular size and charge by column chromatography and isoelectric focusing respectively. The enzymatic activity as measured by 3,3'-diaminobenzidine reaction, the pH optimum and the absorption spectra for the modified enzymes remain virtually unchanged.
More about:Horseradish Peroxidase online
2012年3月18日星期日
Nice Price for Deoxyribonuclease I
Product name: Deoxyribonuclease I
CAS: 9003-98-9
Description of Deoxyribonuclease I:
Deoxyribonuclease I (DNase I) is a single, glycosylated polypeptide that degrades unwanted single- and double-stranded DNA. The enzyme works by cleaving DNA into 5' phosphodinucleotide and small oligonucleotide fragments. DNase I is commonly added to cell lysis reagents to remove the viscosity caused by the DNA content in bacterial cell lysates or to remove the DNA templates from RNAs produced by in vitro transcription. Two grades of DNAse are offered, one sufficient for protein work and one that is useful for any application requiring the digestion of DNA in which it is crucial to avoid damage to RNA.
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Defibrase Provider
Product name: Defibrase
Source: Agkistrodon halys or Agkistrodon acutus venin
EC: 3.4.21.-.
Description of Defibrase:
Defibrase is a proteolytic enzyme, which reduces the concentration of fibrinogen, and blood viscosity, and inhibits platelet aggregation.
Chemical preparations for industrial and scientific purposes, in particular for use in the manufacture of pharmaceutical agents
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Function of Cytochrome C
Product name: Cytochrome C
CAS:9007-43-6
Description of Cytochrome C:
Function:
Cytochrome C is a component of the electron transport chain in mitochondria. The heme group of cytochrome c accepts electrons from the b-c1 complex and transfers electrons to the cytochrome oxidase complex. Cytochrome C is also involved in initiation of apoptosis. Upon release of cytochrome c to the cytoplasm, the protein binds apoptotic protease activating factor.
Cytochrome C can catalyze several reactions such as hydroxylation and aromatic oxidation, and shows peroxidase activity by oxidation of various electron donors such as 2,2-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS), 2-keto-4-thiomethyl butyric acid and 4-aminoantipyrine.
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Chymotrypsinogen for Best Sale
Product name: Chymotrypsinogen
Description of Chymotrypsinogen:
Chymotrypsinogen is an inactive proenzyme secreted by the pancreas and cleaved by trypsin in the small intestine to yield chymotrypsin.
Chymotrypsinogen isa substance produced in the pancreas that is the zymogen precursor to the enzyme chymotrypsin. It is converted to chymotrypsin by trypsin
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Introduction of Chymotrypsin
Product name: Chymotrypsin
Source:Bovine Pancreas
Description of Chymotrypsin: Chymotrypsin is a digestive enzyme that can perform proteolysis.Chymotrypsin preferentially cleaves peptide amide bonds where the carboxyl side of the amide bond (the P1 position) is a tyrosine, tryptophan, or phenylalanine. These amino acids contain an aromatic ring in their sidechain that fits into a 'hydrophobic pocket' (the S1 position) of the enzyme. The hydrophobic and shape complementarity between the peptide substrate P1 sidechain and the enzyme S1 binding cavity accounts for the substrate specificity of this enzyme.Chymotrypsin also hydrolyzes other amide bonds in peptides at slower rates, particularly those containing leucine at the P1 position.
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