翻訳と辞書 Words near each other ・ Purple Ray ・ Purple Records ・ Purple Reign ・ Purple Reign in Blood ・ Purple Revolution ・ Purple ribbon ・ Purple Ribbon All-Stars ・ Purple Ribbon Records ・ Purple rock crab ・ Purple roller ・ Purple ruffles basil ・ Purple sage ・ Purple America ・ Purple and Brown ・ Purple Avengers ・ Purple bacteria ・ Purple Bamboo Park ・ Purple bankclimber ・ Purple bean ・ Purple Belt ・ Purple Beverage Company ・ Purple Blue ・ Purple Book ・ Purple Butterfly ・ Purple Cane, Nebraska ・ Purple chimaera ・ Purple chip ・ Purple chokeberry ・ Purple City Productions ・ Purple Cloud Temple 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 Purple bacteria ： ウィキペディア英語版 Purple bacteria Purple bacteria or purple photosynthetic bacteria are proteobacteria that are phototrophic, that is, capable of producing energy through photosynthesis. They are pigmented with bacteriochlorophyll ''a'' or ''b'', together with various carotenoids, which give them colours ranging between purple, red, brown, and orange. They may be divided into two groups – purple sulfur bacteria and purple non-sulfur bacteria (Rhodospirillaceae). == Metabolism == Photosynthesis takes place at reaction centers on the cell membrane, which is folded into the cell to form sacs, tubes, or sheets, increasing the available surface area. Like most other photosynthetic bacteria, purple bacteria do not produce oxygen (anoxygenic), because the reducing agent (electron donor) involved in photosynthesis is not water. In some, called purple sulfur bacteria, it is either sulfide or elemental sulfur. The others, called purple non-sulfur bacteria (aka PNSB), typically use hydrogen although some may use other compounds in small amounts. At one point these were considered families, but RNA trees show the purple bacteria make up a variety of separate groups, each closer relatives of non-photosynthetic proteobacteria than one another. The reaction centers create a charge separation through a series of favorable redox reactions, after the excitation of the special pigment pair P870. The reduction of quinones leads to the take up of 2 protons from the cytoplasm. When the quinones are eventually oxidized, they release the protons in the periplasmic side. This builds up a proton motive force that is used by ATP synthase to produce ATP from ADP and phosphate.The ATP is finally used in biosynthesis. 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「Purple bacteria」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.