Investigate the Purity of RNA: Ion Exchange Chromatography

Ion-exchange chromatography effectively purifies RNA by separating molecules with different charges. Depending on their protonation state at various pH levels, RNA molecules can carry positive or negative charges. This property is utilized in ion exchange chromatography to control interactions between RNA and the stationary phase by adjusting the solution's ionic strength and pH, thereby achieving separation.

As the first and largest microbial biologics CRDMO in Greater China, Yaohai Bio-Pharma offers end-to-end one-stop tailored solutions or standalone services ranging from RNA synthesis, strain engineering and construction, upstream and downstream process development, to GMP or non-GMP level drug substance manufacturing, and fill & finish services for diverse modalities, such as mRNA, circRNA, plasmid RNA, recombinant proteins, peptides, enzymes, single domain antibodies and VLPs for human and veterinary use.

Let's explore the applications that ion exchange chromatography offers for specific purification processes.

1. Sample Preparation: Dissolve the complex mixture containing the target biomolecules in an appropriate buffer solution. The choice of pH can affect the charge state of biomolecules, thereby influencing the separation efficiency.

2. Column Selection: Choose the appropriate type of ion exchange column based on the charge characteristics of the target molecules. Common column materials include cation exchange resins and anion exchange resins, depending on the charge of the target molecules.

3. Sample Loading: Pass the prepared sample solution through the chromatographic column. The functional groups on the ion exchange resin interact with the charged ions in the sample, resulting in different retention times for molecules with different charge properties.

4. Elution Process: Use elution buffer solutions with gradually increasing ionic strength or altered pH to elute the target biomolecules from the column. These elution conditions gradually modify the interaction between biomolecules and ion exchange resins, achieving purification of the target molecules.

5. Collection of Purified Target Molecules: Collect and analyze the purified fractions of the target biomolecules based on their adsorption characteristics and elution sequence.

6. Post-processing: Perform necessary post-processing steps on the collected target molecules, such as concentration, dissolution, re-crystallization, etc., to obtain the final product with high purity and activity.

Ion exchange chromatography is valuable in biopharmaceutical and biochemical industries for its ability to effectively purify biomolecules such as proteins, nucleic acids, and peptides, providing high-purity products essential for research, diagnostics, and therapeutic applications.

Yaohai Bio-Pharma is also actively seeking institutional or individual global partners and offers the most competitive compensation in the industry. If you have any questions, please feel free to contact us: [email protected]