Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/100844
Type: Artigo de periódico
Title: Purification Of Microbial β-galactosidase From Kluyveromyces Fragilis By Bioaffinity Partitioning
Author: Da Silva M.E.
Franco T.T.
Abstract: This work investigated the partitioning of β-galactosidase from Kluyveromyces fragilis in aqueous two-phase systems (ATPS) by bioaffinity. PEG 4000 was chemically activated with thresyl chloride, and the biospecific ligand p-aminophenyl 1-thio-β-D-galactopyranoside (APGP) was attached to the activated PEG 4000. A new two-step method for extraction and purification of the enzyme β-galactosidase from Kluyveromyces fragilis was developed. In the first step, a system composed of 6% PEG 4000-APGP and 8% dextran 505 was used, where β-galactosidase was strongly partitioned to the top phase (K = 2,330). In the second step, a system formed of 13% PEG-APGP and 9% phosphate salt was used to revert the value of the partition coefficient of β-galactosidase (K = 2 x 10-5) in order to provide the purification and recovery of 39% of the enzyme in the bottom salt-rich phase.
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Rights: aberto
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-22844448692&partnerID=40&md5=2ef5472ee42e3f6655b2db865db5a457
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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