The ionic liquid isopropylammonium formate as a mobile phase modifier to improve protein stability during reversed phase liquid chromatography.
The ionic liquid isopropylammonium formate as a mobile phase modifier to improve protein stability during reversed phase liquid chromatography.
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DOI:
10.1016/j.jchromb.2013.08.005
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发表时间:
2013-12-01
影响因子:
3
通讯作者:
Danielson, Neil D.
中科院分区:
文献类型:
--
作者:
Zhou, Ling;Danielson, Neil D.
The room temperature ionic liquid isopropylammonium formate (IPAF) is studied as a reversed phase HPLC mobile phase modifier for separation of native proteins using a polymeric column and this protein stability is compared to that using acetonitrile (MeCN) as the standard organic mobile phase modifier. A variety of important proteins with different numbers of subunits is investigated, including non-subunit proteins: albumin, and amyloglucosidase (AMY); a two subunit protein: thyroglobulin (THY); and four subunit proteins: glutamate dehydrogenase (GDH) and lactate dehydrogenase (LDH). A significant enhancement in protein stability is observed in the chromatograms upon using IPAF as a mobile phase modifier. The first sharper peak at about 2 min represented protein in primarily the native form and a second broader peak more retained at about 5–6 min represented substantially denatured or possibly aggregated protein. The investigated proteins (except LDH) could maintain the native form within up to 50% IPAF, while a mobile phase, with as low as 10% MeCN, induced protein denaturation. The assay for pyruvate using LDH has further shown that enzymatic activity can be maintained up to 30% IPAF in water in contrast to no activity using 30% MeCN.
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DOI:
10.1016/j.jchromb.2006.10.068
发表时间:
2007-04-15
期刊:
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences
影响因子:
--
作者:
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通讯作者:
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影响因子:
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影响因子:
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DOI:
10.1016/j.chroma.2008.09.064
发表时间:
2009-04-17
期刊:
Journal of chromatography. A
影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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