| 词汇 | deamination |
| 释义 | deamination noun[ U ] chemistry specializeduk /ˌdi.æm.ɪˈneɪ.ʃən/ us /ˌdi.æm.əˈneɪ.ʃən/ the process by which one or more of the groups of atoms containing nitrogen are removed from a molecule脱去（化合物的）氨基（的过程） Physical & chemical processes absorbable absorptive absorptive capacity absorptivity acidification endothermic reaction excitation excite exergonic exothermic exothermic reaction fermentation impregnate reabsorb react reboil recondense redox scald vaporize deamination | American Dictionarydeamination noun[ U ] us/ˌdi·æm·əˈneɪ·ʃən/ biology, chemistry the process by which one or more of the groups of atoms containing nitrogen (= a gas that is a chemical element) are removed from a molecule (= smallest unit of a substance) Examples of deaminationdeamination Transamination and oxidative deamination are the two major enzymatic pathways involved in the removal of the a-amino group of amino acids. They catalyse the oxidative deamination of primary amines by dioxygen to form aldehydes, ammonia, and hydrogen peroxide. Spontaneous deamination of 5-methylcytosine to thymine causes a 12-fold increased mutation frequency relative to unmodified cytosine. However, over time methylated cytosines tend to turn into thymines because of spontaneous deamination. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Several of these keto acids are intermediates in the citric acid cycle, for example the deamination of glutamate forms -ketoglutarate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Hypoxanthine is also a spontaneous deamination product of adenine. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Deamination can be induced in solid or aqueous alanine by radiation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Transitions can be caused by oxidative deamination and tautomerization. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. More specifically, the catalytic domain is a zinc dependent cytidine deaminase domain and is essential for cytidine deamination. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The small subunit contains one active site for the binding and deamination of glutamine to make ammonia and glutamate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The encoded enzyme catalyzes the reversible oxidative deamination of glutamate to alpha-ketoglutarate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is formed by the deamination of adenosine monophosphate, and is hydrolysed from inosine. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Monoamine oxidases catalyze the oxidative deamination of monoamines and thereby form flavoproteins and inactivate neurotransmitters. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Deamination converts nitrogen from the amino acid into ammonia, which is converted by the liver into urea in the urea cycle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The most common mutation is the deamination of cytosine to uracil. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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