Concentration control for protein crystallization via a continuously-fed crystallization chamber

Area of Science:

• Crystallization science
• Biophysics
• Chemical engineering

Background:

• Controlling crystal nucleation and growth is crucial for protein crystallization.
• Existing methods offer limited control over the kinetic pathways during crystallization.
• Understanding crystallization kinetics aids in optimizing crystal formation for research and industrial applications.

Purpose of the Study:

• To develop and demonstrate a continuously-fed crystallization chamber for kinetic path control.
• To investigate lysozyme crystallization kinetics using the developed device.
• To determine kinetic parameters for heterogeneous and homogeneous nucleation.

Main Methods:

• Fabrication of a continuously-fed crystallization chamber.
• Crystallization of lysozyme within the chamber.
• Development of a lumped kinetic model.
• Determination of heterogeneous nucleation kinetics parameters.

Main Results:

• The device enabled kinetic path control through the crystallization phase diagram.
• Heterogeneous nucleation exhibited faster kinetics than homogeneous nucleation.
• Slower growth kinetics were observed for heterogeneous nucleation compared to homogeneous nucleation.
• Lumped-model analysis successfully extracted kinetic parameters.

Conclusions:

• The novel crystallization chamber provides enhanced control over the chemical environment for nucleation and growth studies.
• The device allows for lumped-model analysis to extract critical kinetic parameters.
• Findings contribute to a better understanding of protein crystallization kinetics and control.