Separation of plant membranes by electromigration techniques

Area of Science:

• Biochemistry
• Analytical Chemistry
• Cell Biology

Background:

• Free flow electrophoresis (FFE) is a powerful technique for separating biological molecules and particles.
• Various separation regimes exist within FFE, each with unique applications and efficiencies.
• Understanding these regimes is crucial for optimizing preparative-scale purification and analysis.

Purpose of the Study:

• To review the different separation regimes of free flow electrophoresis.
• To evaluate the applicability of interval and continuous flow electrophoresis.
• To detail the use of FFE for preparative-scale purification of organelles and membrane vesicles.

Main Methods:

• The review covers free flow zone electrophoresis, isoelectric focusing, isotachophoresis, and free flow step electrophoresis.
• It assesses the feasibility of interval and continuous flow electrophoresis.
• Recent advancements in instrumentation and procedures for FFE are described.

Main Results:

• Free flow zone electrophoresis is ideal for separating cells, organelles, and membranes.
• Isoelectric focusing, isotachophoresis, and step electrophoresis offer high resolution for protein and peptide purification.
• FFE enables simultaneous separation of tonoplast and plasma membranes and discrimination of membrane vesicle orientation.

Conclusions:

• FFE is a versatile technique with multiple regimes applicable to diverse biological separations.
• The continuous flow mode of FFE allows for processing large quantities of material.
• Electromigration techniques using FFE can confirm membrane dynamics, characterize functions, and discover new activities.