Abstract:
:Fab fragments isolated from papain digests of monoclonal antibodies have a wide variety of uses in analytical and in both in vivo and in vitro diagnostic applications. A novel, non-affinity method which uses the Gradiflow to purify Fab fragments from the papain digest of a mouse IgG1 anti-c-myc monoclonal antibody is described. The Gradiflow is a preparative electrophoresis instrument that uses polyacrylamide membranes of known pore size to separate proteins in solution in their native state under mild pH conditions by charge or size. The Fab and Fc fragments from the papain digestion were characterized using isoelectric focusing (IEF) and non-reducing SDS-PAGE in conjunction with IEF and Western blot. There were three Fab isoforms with p [Formula: see text] between pH 6.5 and 7.4 while the Fc had a range of isoforms between 6.1 and 6.3. Both Fab and Fc fragments had similar [Formula: see text] of 50kDa. A charge-based purification strategy was developed to obtain a high purity Fab preparation after 10min, confirmed by Western blot and chemiluminescence analyses. A small quantity of residual undigested IgG1 remained and was removed using a size-based separation. The efficiency of the separation despite the narrow pH range between Fab and Fc suggests that this technique may be an alternative to protein A or G affinity separation of Fc and Fab monoclonal antibody fragments from papain digests of monoclonal antibodies.
journal_name
Protein Expr Purifjournal_title
Protein expression and purificationauthors
Coleman L,Mahler SMdoi
10.1016/j.pep.2003.07.005keywords:
subject
Has Abstractpub_date
2003-12-01 00:00:00pages
246-51issue
2eissn
1046-5928issn
1096-0279pii
S1046592803002390journal_volume
32pub_type
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::The plant protein production system is a platform that can not only reduce production costs but also produce monoclonal antibodies that do not have the risk of residual proteins from the host. However, due to the difference between post-translational processes in plants and animals, there may be a modification in the ...
journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::Cell extracts of Clostridium kluyveri grown on ethanol plus succinate contained a NAD(H) dependent 4-hydroxybutanoate dehydrogenase (EC 1.1.1.61) at 66 U/mg. This enzyme was purified 42-fold under anaerobic conditions to homogeneity. Heat treatment, ion exchange chromatography on DEAE-cellulose, nondenaturing polyacry...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.1995.1026
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2003.10.010
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2016.06.013
更新日期:2016-11-01 00:00:00
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2013.01.004
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2015.04.011
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abstract::Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a promising anticancer agent. The aim of this study is to produce large quantities of highly pure and bioactive recombinant human TRAIL. Here, TRAIL was expressed in soluble form by pH-stat fed-batch cultivation and purified using a rapid and simple tw...
journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2005.07.002
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2004.07.019
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abstract::The gene encoding S. cerevisiae Kex2 protease derivative Kex2-667 (encoding the N-terminal 20th to 667th amino acid residues of Kex2 protease, containing the propeptide, catalytic domain, P domain and Ser/Thr enrichment region) and its 225th amino acid residue mutant K225L were overexpressed in Pichia pastoris. Protea...
journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::A method for the simplified, reproducible production of both normal and altered versions of human proinsulin has been developed. A polyhistidine/proinsulin fusion protein was expressed using a prokaryotic expression system and partially purified by affinity chromatography. Disulfide bonds within the polypeptide were f...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.1998.1024
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2003.08.014
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abstract::Integrated studies that address proteins structure and function in the new era of systems biology and genomics often require the application of high-throughput approaches for parallel production of many different purified proteins from the same organism. Cytochromes c-electron transfer proteins carrying one or more he...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2008.06.014
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abstract::Adrenal cytochrome b561 (cyt b561) is the prototypical member of an emerging family of proteins that are distributed widely in vertebrate, invertebrate and plant tissues. The adrenal cytochrome is an integral membrane protein with two b-type hemes and six predicted transmembrane helices. Adrenal cyt b561 is involved i...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2007.04.010
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