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・ Barnardiston baronets
・ Barnardiston family (medieval aristocracy)
・ Barnardiston's Chancery Reports
・ Barnardiston's King's Bench Reports
・ Barnardo
・ Barnardo's
・ Barnardo's Big Toddle
・ Barnards Green
・ Barnardsville, North Carolina
・ Barnardtown
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・ Barnarp Church
・ Barnas
・ Barnas Jazzhus
・ Barnas Sears
Barnase
・ Barnaslingan
・ Barnato
・ Barnato Park High School
・ Barnau, Rajasthan
・ Barnaul
・ Barnaul (disambiguation)
・ Barnaul (inhabited locality)
・ Barnaul Airport
・ Barnaul Cartridge Plant
・ Barnava
・ Barnave
・ Barnave, Drôme
・ Barnaviridae
・ Barnawartha railway station


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Barnase : ウィキペディア英語版
Barnase

Barnase (a portmanteau of "BActerial" "RiboNucleASE") is a bacterial protein that consists of 110 amino acids and has ribonuclease activity. It is synthesized and secreted by the bacterium ''Bacillus amyloliquefaciens'', but is lethal to the cell when expressed without its inhibitor barstar. The inhibitor binds to and occludes the ribonuclease active site, preventing barnase from damaging the cell's RNA after it has been synthesized but before it has been secreted. The barnase/barstar complex is noted for its extraordinarily tight protein-protein binding, with an on-rate of 108s−1M−1.
==Protein folding studies==
Barnase has no disulfide bonds, nor does it require divalent cations or non-peptide components to fold. This simplicity, in combination with its reversible folding transition, means that barnase has been extensively studied in order to understand how proteins fold. The folding of barnase has been extensively studied in the laboratory of Alan Fersht, who used it as the test case in developing a method of characterizing protein folding transition states known as phi value analysis.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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