Abstract
It is well known that sucrose stabilizes the native state of globular proteins against both chemical denaturants and temperature. A largely accepted explanation of sucrose-induced stabilization is not yet emerged. It is shown that the same theoretical approach able to rationalize the occurrence of cold denaturation, the contrasting role of GdmCl and Gdm2SO4, and the TMAO counteraction of urea denaturing activity [PCCP 12 (2010) 14245; PCCP 13 (2011) 12008; PCCP 13 (2011) 17689] works well also in the case of sucrose. The solvent-excluded volume effect plays the fundamental role because sucrose addition to water causes a marked increase in volume packing density due to the large size of sucrose molecules, that act as crowding agents.
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