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Comparison of SEC Separation of Monoclonal Antibody


Antibody drugs have been spotlighted as therapeutic agents which have a high specificity to the target molecule with few side effects. It is known that dimer and/or larger aggregates may be produced during the manufacturing process or storage of antibody drugs. Since it is possible that these aggregates may become immunogenic to induce antibody production and/or cellular immunity in the body and cause side effects, it is important for quality control to analyze these impurities. Monomers and dimers can be separated effectively using PROTEIN LW-803. Therefore, LW-803 is suitable for monitoring impurities.

Sample : 20 μL
IgG from recombinant CHO cell 1 mg/mL
1. Aggregates
2. Trimer
3. Dimer
4. Monomer

Company B 2.1 2.6
Company A 2.5 2.4
LW-803 2.6 3.4
Columns      : Shodex PROTEIN LW-803 (8.0 mm I.D. x 300 mm)
               Silica-based SEC column from other manufacturer (7.8 mm I.D. x 300 mm each)
Eluent       : 50 mM Sodium phosphate buffer (pH7.0) + 0.3 M NaCl
Flow rate    : 1.0 mL/min
Detector     : UV (280 nm)
Column temp. : Room temp.

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