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Related Concept Videos

Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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Related Experiment Video

Updated: Jul 4, 2026

Optimization of Crystal Growth for Neutron Macromolecular Crystallography
12:29

Optimization of Crystal Growth for Neutron Macromolecular Crystallography

Published on: March 13, 2021

Strategies for improving crystallization success rates.

Rebecca Page1

  • 1Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA.

Methods in Molecular Biology (Clifton, N.J.)
|June 11, 2008
PubMed
Summary

Crystallization remains a challenge in structural genomics. This work presents four cost-effective strategies—orthologue screening, NMR, deletion constructs, and solubility screening—to improve protein structure determination.

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Last Updated: Jul 4, 2026

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Area of Science:

  • Structural biology
  • Structural genomics

Background:

  • Crystal production is a major bottleneck for high-resolution protein structure determination.
  • Structural genomics (SG) consortia face challenges implementing protein-specific optimization strategies.

Purpose of the Study:

  • To describe four strategies to increase the number of protein targets yielding atomic resolution structures.
  • To present cost-effective methods applicable to SG and academic labs.

Main Methods:

  • Orthologue screening for suitable protein targets.
  • 1D proton Nuclear Magnetic Resonance (NMR) spectroscopy to assess protein folding.
  • Deletion construct generation to remove disordered regions and enhance crystallization.
  • Crystallization optimum solubility screening to identify optimal buffers.

Main Results:

  • Implementation of these strategies increases the number of solved protein structures.
  • These methods are highly applicable to both SG consortia and academic laboratories.
  • The strategies do not require expensive robotics.

Conclusions:

  • The presented strategies effectively address crystallization bottlenecks in structural genomics.
  • These approaches enhance the efficiency of determining protein structures at atomic resolution.
  • The cost-effectiveness makes them valuable for diverse research settings.