Protein purification with novel porous sheets containing derivatized cellulose

Area of Science:

• Materials Science
• Chromatography
• Biotechnology

Background:

• Cellulosic ion exchange media are widely used in chromatography.
• Traditional packed columns have limitations in flow rate and device fabrication.

Purpose of the Study:

• To develop and evaluate novel porous sheets incorporating cellulosic ion exchange media.
• To demonstrate the advantages of a porous sheet format for chromatography and device fabrication.

Main Methods:

• Preparation of porous sheets with cellulosic ion exchange media in a PVC matrix.
• Evaluation of material properties including alkali resistance and nonspecific binding.
• Demonstration of protein separation using a linear salt gradient on a single sheet.
• Fabrication of an Acti-Mod Spiral Module using the porous sheet material.

Main Results:

• The porous sheets exhibit alkali resistance, clean-in-place capability, and low nonspecific binding.
• The porous sheet format allows for higher flow rates (10-fold or greater) compared to packed columns.
• Successful chromatographic separation of natural egg white proteins was achieved.
• A novel spiral module device was fabricated, demonstrating selective component removal from biological suspensions.

Conclusions:

• Porous sheets with cellulosic ion exchange media offer a versatile format for chromatography.
• The format enables higher throughput and novel device designs, such as the spiral module.
• These materials present a significant advancement for bioseparations and purification processes.