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High Pressure Research
An International Journal
Volume 19, 2000 - Issue 1-6
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Original Articles

Pressure unfolding facilitates the formation of temperature gels

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Pages 323-329 | Received 09 Sep 1999, Published online: 19 Aug 2006
 

Abstract

The formation of protein aggregates after pressure treatment was investigated by Fourier Transform Infrared Spectroscopy (FTIR). The results show that the pressure unfolded protein ends in a conformation, after the release of the pressure, which has an increased tendency to aggregate, even at temperatures lower than the denaturation temperature of the untreated protein. After pressure pretreatment the infrared spectrum shows the same intermolecular antiparallel β-structure features as observed after a temperature treatment that gives rise to protein gelation. on the other hand, this structure can be destabilized by applying moderate pressures, which are significantly lower than the corresponding denaturation pressure.

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