Summary
Isoelectric point (pI) microheterogeneity of an IgG monoclonal antibody (L6) was studied by rapid affinity chromatography, isoelectric focusing on polyacrylamide gels, and rapid ion-exchange chromatography. An abiotic or strictly chemical basis for observed changes is postulated. The described methods are useful for monoclonal antibody process monitoring since they are rapid, automated assay procedures.
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Compton, B.J., Gerald, J.S., Lowe, D.A. et al. Micro isoelectric point heterogeneity of a murine monoclonal antibody (L6) originating from cell cultivation conditions. Biotechnol Tech 3, 349–354 (1989). https://doi.org/10.1007/BF01875635
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DOI: https://doi.org/10.1007/BF01875635