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The influence of precipitant concentration on macromolecular crystal growth mechanisms

Published on Nov 1, 2001in Journal of Crystal Growth1.57
· DOI :10.1016/S0022-0248(01)01062-4
Yu. G. Kuznetsov19
Estimated H-index: 19
(UCI: University of California, Irvine),
A. J. Malkin23
Estimated H-index: 23
(UCI: University of California, Irvine),
Alexander McPherson51
Estimated H-index: 51
(UCI: University of California, Irvine)
Abstract
Abstract Atomic force microscopy was applied to investigate the influence of protein and precipitant (sodium-potassium tartrate) concentration on thaumatin crystal growth mechanisms. At constant protein concentration, a decrease of salt concentration from 0.8 to 0.085 M caused a transition of the crystal growth mechanism from two-dimensional nucleation to dislocation growth. At different, fixed concentrations of salt, the protein concentration, which does not induce multiple crystal nucleation, was increased from 8 to 60 mg/ml with corresponding increases in the tangential velocity of growth steps from 5 to 17.5 nm/s. Results from these experiments suggest that a highly concentrated protein solution, as might be found in a protein rich phase, may not induce crystal nucleation, but can promote crystal growth if screw dislocations are present in the crystal.
  • References (14)
  • Citations (13)
References14
Newest
#1Yu. G. Kuznetsov (UCI: University of California, Irvine)H-Index: 19
#2A. J. Malkin (UCI: University of California, Irvine)H-Index: 23
Last.Alexander McPherson (UCI: University of California, Irvine)H-Index: 51
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#2John H. Konnert (NRL: United States Naval Research Laboratory)H-Index: 14
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