Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/80735
Type: Artigo de periódico
Title: Recovery and purification of aprotinin from industrial insulin-processing effluent by immobilized chymotrypsin and negative IMAC chromatographies
Author: de Genaro, ACB
Tamagawa, RE
Azzoni, AR
Bueno, SMA
Miranda, EA
Abstract: Aprotinin, a bovine protease inhibitor currently also produced in recombinant bacteria, yeast, and corn, has valuable applications as a human therapeutic and in tissue culture. The objective of this work was to develop the basis of a large-scale aprotinin purification process centered on immobilized metal ion affinity chromatography (IMAC). This technique uses ligands-metal ions-of a lower cost and higher stability than those traditionally used in affinity chromatography. Since aprotinin does not interact with IMAC ligands, collection is from the nonretained fractions (negative chromatography). Stirred-tank batch IMAC adsorption experiments indicated that one-step aprotinin purification could not be successful. Immobilized chymotrypsin chromatography was then used as a prepurification step, yielding a suitable feed for IMAC (with purification factors as high as 476). IMAC column fed with these prepurified materials produced purified aprotinin in the nonretained fractions with purification factors as high as 952. (C) 2002 Elsevier Science Ltd. All rights reserved.
Subject: IMAC
purification
aprotinin
negative chromatography
affinity
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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