Thekey difference在过氧化氢酶和过氧化物酶之间过氧化氢酶催化decomposition的hydrogen peroxideinto water and oxygen, whereas peroxidase catalyzes the decomposition ofperoxides.
Catalase and peroxidase are common enzymes. An enzyme is a biological component that is important in catalyzing chemical reactions by reducing the activation energy barrier of the reaction. Therefore, an enzyme can enhance the rate of that particular chemical reaction.
CONTENTS
1.Overview and Key Difference
2.What is Catalase
3.什么是过氧化物酶
4.并排比较 - 表格形式的过氧化氢酶与过氧化物酶
5.概括
What is Catalase?
过氧化氢酶是在生物体中发现的一种常见酶,对于分解过氧化氢以形成水和氧气很重要。我们几乎可以在暴露于氧气的所有生物中找到这种酶。例如。因此,细菌,植物,动物等。因此,这种酶对于保护我们的人体免受由过氧化氢形成的反应性氢物质的氧化损伤非常重要。
When considering the chemical structure of catalase, it is a tetramer. That means, this enzyme molecule contains four polypeptide chains. Each polypeptide chain is about 500 amino acids long. There is a collection of four iron-containing heme groups that are important in the decomposition of hydrogen peroxide. For this enzyme, the optimum pH level inside the human body is pH 7. However, the rate of the reaction does not change much if the pH ranges between 6.8 and 7.5. In addition, the optimum temperature varies according to the animal species.
Most organisms use catalase enzymes in every organ they have. Generally, the liver contains a high concentration of catalase, especially in mammals. Primarily, it occurs in peroxisomes and cytosol of erythrocytes. Moreover, this enzyme is extracted and used in the food industry for the removal of hydrogen peroxide from milk prior to cheese production. In addition to that, it is useful in food wrappers to prevent food from oxidizing.
什么是过氧化物酶?
Peroxidase is a common enzyme that is important in decomposing peroxide compounds. It is also named as peroxide reductase. In addition to the decomposition of peroxides, there are other biological processes that use this enzyme for proper function. For example, peroxides are important in the treatment of industrial wastewater, to convert toxic substances into less harmful substances, to and polymerize anilines and phenols. They are sometimes used as histological markers, as well.
For most chemical reactions that involve the peroxidase enzyme, the optimal substrate is hydrogen peroxide. However, this enzyme is more active than other substrates such as organic hydroperoxides, e.g. liquid peroxides.
What is the Difference Between Catalase and Peroxidase?
Catalase and peroxidase are enzymes. The key difference between catalase and peroxidase is that catalase catalyzes the decomposition of hydrogen peroxide into water and oxygen, whereas peroxidase catalyzes the decomposition of peroxides. Therefore, catalase is a type of peroxidase enzyme. Moreover, the optimum substrate for a peroxidase is hydrogen peroxide, which is the substrate for catalase enzyme.
The following infographic summarizes the differences between catalase and peroxidase in tabular form.
概括– Catalase vs Peroxidase
An enzyme is a biological component that can enhance the rate of a chemical reaction by reducing the activation energy barrier. Catalase and peroxidase are enzymes. The key difference between catalase and peroxidase is that catalase catalyzes the decomposition of hydrogen peroxide into water and oxygen, whereas peroxidase catalyzes the decomposition of peroxides.
Reference:
1. “Catalase.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 27 Dec. 2017,Available here.
Image Courtesy:
1. “Hydrogen-peroxide-2D” Public Domain) viaCommons Wikimedia
2. http://en.wikipedia.org/wiki/user:Jag123 - http://en.wikipedia.org/wiki/image/image:Glututperoxidase-1gp1.png(public domain)通过Commons Wikimedia
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