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Competitive elution...
Competitive elution of protein A fusion proteins allows specific recovery under mild conditions.
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Nilsson, J (author)
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- Nilsson, Peter (author)
- KTH,Proteomik
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Williams, Y (author)
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Pettersson, L (author)
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Uhlén, M (author)
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Nygren, P A (author)
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(creator_code:org_t)
- Wiley, 1994
- 1994
- English.
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In: European Journal of Biochemistry. - : Wiley. - 0014-2956 .- 1432-1033. ; 224:1, s. 103-8
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- A novel system is described for mild elution of fusion proteins by competitive elution. The approach is based on displacement of immobilized fusions containing a monovalent IgG-binding staphylococcal protein A fragment (Z) from an IgG-affinity matrix by a divalent fragment fused to a serum-albumin-binding region derived from streptococcal protein G. Using real-time interaction analysis, the binding (K(aff)) to polyclonal human IgG was found to be 3.3 (+/- 0.4) x 10(8) M-1 for divalent ZZ and 2.0 (+/- 0.1) x 10(7) M-1 for monovalent Z. This more than tenfold difference in binding strength ensures a high efficiency in the elution step. The competitor protein can specifically be removed and recovered from the elution mixture by subsequent passage through a human serum albumin(HSA)-affinity column, leaving only the target fusion protein in the flow-through fraction. Here, we show that a recombinant Klenow fragment of DNA polymerase I expressed in Escherichia coli can be recovered with high yield, and retained activity, from a crude bacterial lysate by IgG-affinity chromatography using mild conditions during both binding and elution.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinsk bioteknologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Medical Biotechnology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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