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NHS-Haloacetyl Crosslinkers
NHS-Maleimide Crosslinkers
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Amine-to-Sulfhydryl Crosslinkers 
Heterobifunctional protein crosslinking reagents for conjugation between primary amine (lysine) and sulfhydryl (cysteine) groups of proteins and other molecules; available with different lengths and types of spacer arms.

NHS-Haloacetyl Crosslinkers 
Amine-to-sulfhydryl heterobifunctional crosslinking reagents based on NHS ester and iodoacetyl, bromoacetyl or other haloacetyl reactive groups. 


NHS-Maleimide Crosslinkers 
Amine-to-sulfhydryl (lysine-to-cysteine) crosslinking reagents based on N-hydroxysuccinimide and maleimide reactive groups; includes Sulfo-SMCC and forms containing long, polyethylene glycol (PEG) spacer arms. 


NHS-Pyridyldithiol Crosslinkers 
Amine-to-sulfhydryl (lysine-to-cysteine) crosslinking reagents based on N-hydroxysuccinimide and pyridyldithiol reactive groups; disulfide bond renders the crosslink (spacer arm) cleavable with reducing agents. 

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