Mal-Cyclohexyl-PEG3-Biotin linker contains a biotin group and a maleimide group. The maleimide group specifically labels and crosslinks with cysteines and other sulfhydryls (at pH 6.5-7.5) and form a stable, irreversible thioether bond.
Polyethylene Glycol PEG Linkers > Biotin PEG > Biotin-PEG-Mal
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