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Bacteriorhodopsin : ウィキペディア英語版
Bacteriorhodopsin
Bacteriorhodopsin is a protein used by Archaea, most notably by Halobacteria, a class of the Euryarchaeota.〔See the NCBI (webpage on Halobacteria )〕It acts as a proton pump; that is, it captures light energy and uses it to move protons across the membrane out of the cell. The resulting proton gradient is subsequently converted into chemical energy.〔 name="urlBacteriorhodopsin: Pumping Ions">(【引用サイトリンク】 Bacteriorhodopsin: Pumping Ions )
== Structure ==

Bacteriorhodopsin is an integral membrane protein usually found in two-dimensional crystalline patches known as "purple membrane", which can occupy up to nearly 50% of the surface area of the archaeal cell. The repeating element of the hexagonal lattice is composed of three identical protein chains, each rotated by 120 degrees relative to the others. Each chain has seven transmembrane alpha helices and contains one molecule of retinal buried deep within, the typical structure for retinylidene proteins.

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「Bacteriorhodopsin」の詳細全文を読む



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