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Crystal Growth: Principles of Crystallization

Crystal Growth: Principles of Crystallization

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.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...

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Updated: Feb 24, 2026

Protein Crystallization for X-ray Crystallography

Protein Crystallization for X-ray Crystallography

Published on: January 16, 2011

Crystal phase formation in crowded lysozyme solutions.

Ivaylo L Dimitrov^1,2

¹Institute of Physical Chemistry "Rostislaw Kaischew", Bulgarian Academy of Sciences Acad. G. Bonchev Str., bl. 11 1113 Sofia Bulgaria idimitrov@ipc.bas.bg.

|February 23, 2026

Summary

Lysozyme crowding in solution can trigger rapid crystal formation by altering the protein-salt phase diagram. This controlled method aids in predicting crystallization nucleation times.

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Protein Crystallization for X-ray Crystallography

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Area of Science:

Biochemistry
Crystallography
Materials Science

Background:

Protein crystallization is crucial for structural biology and drug development.
Understanding crystallization in crowded environments is key to mimicking cellular conditions.

Purpose of the Study:

To investigate lysozyme crystallization in a crowded environment.
To explore the impact of controlled crowding on crystal phase formation and nucleation.

Main Methods:

Utilized microliter volume drops of buffered lysozyme solutions (pH 4.0) with varying initial vapor pressure.
Achieved high lysozyme concentrations (over 250 mg ml⁻¹) and buffer salt concentrations (0.31 M sodium acetate) without added precipitants.
Monitored crystallization dynamics across a temperature range of 18-33 °C.

Main Results:

Gradual lysozyme crowding led to abrupt crystal phase formation.
The metastable zone was effectively widened, and the nucleation zone narrowed towards the unstable region.
Nucleation events occurred cooperatively, followed by rapid crystal growth occupying most of the drop volume.
Minimal temperature dependence was observed for crystal formation, primarily affecting equilibration rate.

Conclusions:

Controlled protein crowding is an effective strategy to induce and manage crystallization.
The developed method allows for prediction of crystal nucleation timing.
This approach offers insights into biomolecular condensation and phase separation phenomena.