Abstract
Genetically engineered immunoglobulins (Igs) carrying viral B or T cell peptides in the CDR3 loop, function as efficient delivery system of the defined viral epitopes. Two of these antigenized Igs (AIgs) were derivatized with 2-O-monomethoxypolyethylene glycol-4,6-dichloro-s-triazine (mPEG). Herein, we describe a two-step strategy to purify mPEG-derivatized AIgs (AIgs-mPEG). Unr chromatography using ammonium hydrogencarbonate as a buffer system. Mildly PEGylated AIgs were isolated from free and highly derivatized AIgs by anion-exchange chromatography. Electrophoretic analysis indicated that the AIgs-mPEG preparation contained less than 4·10-4 M unreacted mPEG. This strategy may be applied to other mPEG-derivatized monoclonal antibodies.
Original language | English |
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Pages (from-to) | 219-225 |
Number of pages | 7 |
Journal | Journal of Chromatography A |
Volume | 696 |
Issue number | 2 |
DOIs | |
State | Published - 14 Apr 1995 |
Externally published | Yes |