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Dye covalently attached to lysine/cysteine side chain ... ?

PostPosted: Tue 20 Jan 2015 13:06
by Interchim
Is the dye covalently attached to lysine or cysteine side chain in the antibody?
FAQ from Biotium

The dye is covalently attached to the side chains of amino acids located far away from the antigen-binding sites so that the affinity of the antibody is not affected. However, the exact attachment sites and the nature of chemical linkages are proprietary information.