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Deamination is the removal of an amino group from a molecule. [1] Enzymes that catalyse this reaction are called deaminases. In the human body, deamination takes place primarily in the liver; however, it can also occur in the kidney. In situations of excess protein intake, deamination is used to break down amino acids for energy.
One example of this is a study conducted by D. Fattori looking at the regioselectivity of the Demjanov rearrangement in one-carbon enlargements of naked sugars. It showed that when an exo methylamine underwent Demjanov nitrous acid deamination, ring enlargement was not produced.
RNA editing by APOBEC-1 requires homodimerization and this complex interacts with RNA-binding proteins to form the editosome. [2] The resulting structure interacts with the codon CAA at codon 2153 and deaminates it into UAA, producing a stop codon that results in mRNA that is translated into the intestinal apoB-48 isoform . [ 3 ]
The SSAT consists of a brief unscored writing sample and multiple choice sections comprising quantitative (mathematics), reading comprehension, and verbal questions. An experimental section at the end is unscored. [1] The test, written in English, is administered around the world at hundreds of test centers, many of which are independent schools.
This page will attempt to list examples in mathematics. To qualify for inclusion, an article should be about a mathematical object with a fair amount of concreteness. Usually a definition of an abstract concept, a theorem, or a proof would not be an "example" as the term should be understood here (an elegant proof of an isolated but particularly striking fact, as opposed to a proof of a ...
Diphenylamine is produced by the thermal deamination of aniline over oxide catalysts: 2 C 6 H 5 NH 2 → (C 6 H 5) 2 NH + NH 3. It is a weak base, with a K b of 10 −14. With strong acids, it forms salts. For example, treatment with sulfuric acid gives the bisulfate [(C 6 H 5) 2 NH 2] + [HSO 4] − as a white or yellowish powder with m.p. 123 ...
It creates mutations in DNA [6] [7] by deamination of cytosine base, which turns it into uracil (which is recognized as a thymine). In other words, it changes a C:G base pair into a U:G mismatch. The cell's DNA replication machinery recognizes the U as a T, and hence C:G is converted to a T:A base pair.
In enzymology, a glucosamine-6-phosphate deaminase (EC 3.5.99.6) is an enzyme that catalyzes the chemical reaction. D-glucosamine 6-phosphate + H 2 O D-fructose 6-phosphate + NH 3. Thus, the two substrates of this enzyme are glucosamine 6-phosphate and H 2 O, whereas its two products are fructose 6-phosphate and NH 3.