翻訳と辞書 Words near each other ・ Nitrogen Oxide Protocol ・ Nitrogen oxide sensor ・ Nitrogen pentafluoride ・ Nitrogen rejection unit ・ Nitrogen rule ・ Nitrogen tribromide ・ Nitrogen trichloride ・ Nitrogen trifluoride ・ Nitrogen triiodide ・ Nitrogen washout ・ Nitrogen-13 ・ Nitrogen-15 nuclear magnetic resonance spectroscopy ・ Nitrogen-vacancy center ・ Nitrogenase ・ Nitrogenase (flavodoxin) ・ Nitrogenous base ・ Nitrogen–phosphorus detector ・ Nitroglycerin ・ Nitroguanidine ・ Nitroimidazole ・ Nitrome ・ Nitromemantine ・ Nitromersol ・ Nitromethane ・ Nitromethane (data page) ・ Nitromethaqualone ・ Nitromors ・ Nitron ・ Nitronate ・ Nitronate monooxygenase Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nitrogenous base ： ウィキペディア英語版 Nitrogenous base The main biological function of a nitrogenous base is to bond nucleic acids together. A nitrogenous, or nitrogen-containing, base is an organic molecule with a nitrogen atom that has the chemical properties of a base. A nitrogenous base owes its basic properties to the lone pair of electrons of a nitrogen atom. Nitrogenous bases are typically classified as the derivatives of two parent compounds, pyrimidine and purine.〔Nelson and Cox 2008, p. 272.〕 They are non-polar and due to their aromaticity, planar. Both pyrimidines and purines resemble pyridine and are thus weak bases and relatively unreactive towards electrophilic aromatic substitution.〔Carey 2006, p. 1206.〕 ==Role in nucleic acids== (詳細はbiological sciences, nitrogenous bases are increasingly termed nucleobases because of their role in nucleic acids - their flat shape is particularly important when considering their roles as the building blocks of DNA and RNA. A set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up the nucleic acids like DNA and RNA. These nitrogenous bases are adenine (A), uracil (U), guanine (G), thymine (T), and cytosine (C). These nitrogenous bases hydrogen bond between opposing DNA strands to form the rungs of the "twisted ladder" or double helix of DNA or a biological catalyst that is found in the nucleotides. Adenine is always paired with thymine, and guanine is always paired with cytosine. These are known as base pairs. Uracil is only present in RNA, replacing thymine. Pyrimidines include uracil, thymine, cytosine. They have a single ring structure. Purines include adenine and guanine. They have a double ring structure.〔library.med.utah.edu/NetBiochem/pupyr/pp.htm〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nitrogenous base」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.