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Heat-induced aggregation of β-lactoglobulin studied by dynamic light scattering
Lund University, Sweden.ORCID-id: 0000-0002-3350-0242
Lund University, Sweden.
Lund University, Sweden.
1996 (Engelska)Ingår i: International Dairy Journal, ISSN 0958-6946, E-ISSN 1879-0143, Vol. 6, nr 4, s. 343-357Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The in situ heat-induced aggregation of commercial β-lactoglobulin as such, or after further purification, was followed to a z-average hydrodynamic diameter of 15-20 nm at 59-63°C by dynamic light scattering. In this temperature range, measurable increase of hydrodynamic diameter occurred after an apparent lag period, which was strongly dependent on heating temperature, pH and initial protein concentration. The changes in time scale of the aggregation process agreed with changes in amount of unfolded β- lactoglobulin, assuming a two-state model of the denaturation. The pH dependence reflected the midpoint unfolding temperature and not the sulphydryl group reactivity, suggesting that this reactivity was not rate limiting in the aggregation. The aggregation process was modelled numerically with Fuchs-Smoluchowski kinetics.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd , 1996. Vol. 6, nr 4, s. 343-357
Nationell ämneskategori
Lantbruksvetenskap och veterinärmedicin
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URN: urn:nbn:se:ri:diva-68438DOI: 10.1016/0958-6946(95)00019-4Scopus ID: 2-s2.0-0030118518OAI: oai:DiVA.org:ri-68438DiVA, id: diva2:1817924
Tillgänglig från: 2023-12-07 Skapad: 2023-12-07 Senast uppdaterad: 2023-12-08Bibliografiskt granskad

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Elofsson, Ulla

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