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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39337

Title: Effect of alcohol on purification of plasmid DNA using ion-exchange membrane
Authors: Wen-Chi Tseng
Fu-Lyn Ho
Tsuei-Yun Fang
Shing-Yi Suen
Contributors: 國立臺灣海洋大學:食品科學系
Keywords: Membrane chromatography
Batch adsorption
Polyethersulfone
Chaotropic salt
Date: 2004-04
Issue Date: 2016-12-05T07:50:28Z
Publisher: Journal of Membrane Science
Abstract: Abstract: An ion-exchange membrane, positively charged with quaternary ammonium groups on polyethersulfone copolymer, was used to purify plasmid DNA from bacterial lysate in this work. Batch operation was used to examine how plasmid purification was affected after the incorporation of alcohols or a chaotropic salt, guanidine hydrochloride, into the washing buffers. The incorporation of alcohol had two opposite effects on the binding strengths between nucleic acids and the partially hydrophobic membrane. The binding can be enhanced by the reduced dielectric constant and on the other hand be decreased by the increased hydrophobicity. At alcohol concentration above 40% (v/v), enhancement of plasmid yield was observed for the use of methanol, ethanol, or isopropanol. The use of guanidine hydrochloride by itself decreased the plasmid yield. Such decreases, however, could be restored when guanidine hydrochloride was used together with alcohol. When membrane chromatography was used to purify plasmid using the washing buffer which contained 40% isopropanol and 1.5 M NaCl, protein and RNA were undetected in the eluted plasmid.
Relation: 233(1)
233(2)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39337
Appears in Collections:[食品科學系] 期刊論文

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