Abstract
For therapeutic and diagnostic applications, site-specific antibody conjugates have proven superior for both the ease of characterization as well as for optimal biophysical and therapeutic properties. Screening multiple antibodies on multiple sites with multiple linker-drugs can become very tedious and time-consuming. As solid-phase reactions are best suited to simplify multistep reactions, readily available protein A/L agarose beads can be utilized to generate site-specific, antibody -drug conjugates on engineered cysteines. Multiple site-specific labels on an antibody with either fluorophore or other-linker drugs is highly desired to evaluate antibody trafficking or payload-synergy for therapeutics. Utilizing solid-phase conjugation, a simple method to generate dual-labeled, site-specific antibody and Fab conjugates from antibody with engineered cysteine is also been described.
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