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The effect of diluting crystallization droplets on protein crystallization in vapor diffusion method

✍ Scribed by Qin-Qin Lu; Da-Chuan Yin; Si-Xiao Xie; Yong-Ming Liu; Rui-Qing Chen

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
200 KB
Volume
46
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

In this study, effects of diluting either protein or crystallization agents in the droplets on the success rate of protein crystallization was investigated. Diluting the crystallization agent was found to increase the success rate of protein crystallization. Theoretical analysis showed that, concentration ranges of both protein and crystallization agent that can be scanned during the vapor diffusion process are wider with diluting the crystallization agent than that without dilution, resulting in more opportunities for the crystallization solution to be in the nucleation zone. On the other hand, diluting protein could lead to controversial results depending on the location of the initial concentration relative to that of the nucleation zone in the phase diagram. The method of diluting the crystallization agent is therefore proposed as an alternative modification to the conventional vapor diffusion method for obtaining more crystallization conditions in protein crystallization screening. (Β© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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