| CAS No.: | 9002-10-2 |
|---|---|
| Formula: | No |
| EINECS: | 232-653-4 |
| Classification: | Biochemical Reagents |
| Grade: | Br |
| Specific Usage: | For Biological Purpose |
| Samples: |
|---|
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Audited Supplier 
| Grouping | Enzyme |
| Keywords | Polyphenol oxidase |
| Brand | NJDULY |
| Model | E0145 |
| Place of Origin | Nanjing, China (Mainland) |
| Payment | T/T |
| Port | Shanghai |
| Supply Capacity | 100 per piece/Month |
| Packing | 5KU/piece |
| Other packaging | please consult customer service |
| To Find Out More, Click Here | |
CAS: 9002-10-2
Grade: BR
Vitality: ≥500units/mg
Activity definition: In 3ml reaction mixture containing L-dihydroxyphenylalanine and L-ascorbic acid, at pH 6.5 and 25ºC, ΔA265 changes to 0.001 as an enzyme activity unit within 1 min
Optimal PH: 6.0~7.0
Product description: Polyphenol oxidase is a bifunctional, copper-containing oxidase having cresolase activity. It is responsible for browning reactions through the phylogenetic scale. The enzyme has a molecular weight of 128KDa.
Properties: powder. A class of enzymes that can catalyze the oxidation of phenolic compounds (such as tyrosine, phenolic compounds, etc.) into quinones. Such enzymes are widely present in nature, and are widely distributed in plants, such as potatoes, tea, and sumac milk which are quite high in content. The melanin in the skin, hair, and cornea of higher animals is also the product of the enzyme oxidizing tyrosine. Such enzymes are also produced in mushrooms and other fungi and other microorganisms. Usually extracted from wild mushrooms, one of the biological catalysts, a protein containing copper ions. The molecular weight is 25×105. Isoelectric point <5.0; nitrogen content is about 13.6%. The copper content is about 0.25%. The UV absorption peaks are at 273nm and 330nm. The suitable temperature for catalysis is 25ºC.
Uses: It is mainly used as a biochemical reagent in scientific research. It catalyzes the oxidation of tyrosine to dopa and further oxidation of dopa to the precursor of melanin-dopaquinone. In industry, this enzyme has a dual function: on the positive side, it can be used in the later fermentation of beer to improve the stability of beer and prevent turbidity by using the oxidation effect of this enzyme; it can also be made into an immobilized enzyme for phenol-containing Wastewater treatment. On the downside, when the fruits and vegetables containing the enzyme are cut open and exposed to the air, due to the catalytic action of the enzyme, the corresponding quinone will be generated at the cut, which is dark brown and must be cut off before being eaten. Generally, blanching, acidification or sulfurous acid treatment can be used to inhibit its effect.
Storage: -20ºC
Nanjing Duly Biotech Co.,Ltd
has been established for 11 years. It is mainly engaded in biological and chemical reagents,including enzyme reagents, proteins, nucleic acids, pigments, amino acids, vitamins,carbohydrates, buffers, surfactants,culture media and Separation of materials and kits.There are more than 10,000 products in total.
Our company's aim is to provide customers with the best quality products and the most intimate service.Personnel has been trained; every batch of material is checked; each procedure guarantees the quality; every bag of our products is top grade;service is thoughtful all the time.The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
Q1: Are you a manufacturer?
Answer: Yes, we are factory founded on 2009.
Q2:How to contact with us?
Answer:Click the Alibaba "Contact Supplier" And then send us message the product you interest in, you will get reply within 24 hours.
Q3:Can you give me a discount price?
Answer:Surely,It depend on your qty.
Q4: How can i get a sample?
Answer:Free sample is available,but freight charges will be at your account and the charges will be return to you dudect from your order in future.
Q5:What are the main categories of products sold by the company?
Answer: It is mainly engaded in biological and chemical reagents,including enzyme reagents, proteins, antibiotics, plant hormones, nucleic acids, pigments, amino acids, vitamins, carbohydrates, buffers, surfactants, culture media and Separation of materials and kits.
Q6:Is the company mainly engaged in small packaging or large packaging?
Answer: Mainly do small packaging reagents, large packaging also do, specific can ask customer service personnel.
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