Conjugation of DSPE-PEG(2000) succinyl carboxylic acid to amine of antibody
Carboxyl groups on the phospholipid can be activated by using water soluble carbodiimide reagents like EDC. Including sulfo-NHS in the reaction mixture generates ester derivatives that couple more efficiently than does EDC intermediate alone. These reactive ester intermediates can further be conjugated to amine on the antibody to form stable amide bond.
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