Cross-linking Reaction




Product Description
Hetero-bifunctional cross-linking reagents have activated esters and maleimide reactive groups. These functional groups react with amines and sulfhydryl groups of proteins, respectively. Enzyme-labeled haptens are prepared using hetero-bifunctional cross-linking reagents such as EMCS or GMBS. The cross-linking reaction requires neutral pH and mild temperature since it is necessary to maintain enzyme activity and antibody titers in the cross-linking reaction. Heterobifunctional cross-linking reagents with 3, 5, 7, or 10 linear carbon chains are available. These linear aliphatic chains act as spacers between the two reactive sites and their water-soluble reagents. They are more stable than the aromatic cross-linking reagents such as succinimidyl-4-N-maleimidobenzoate in a wider pH range.


Conjugation of Macromolecules with Hetero-Bifunctional Cross-Linking Reagent

Hetero-bifunctional Reagents

Product Name	Code	Length (Å)
Sulfo-EMCS	S024	9.4
Sulfo-GMBS	S025	6.9
Sulfo-HMCS	S026	13.0
Sulfo-KMUS	S250	16.7

1) J. V. Staros, N-Hydroxysulfosuccinimide Active Esters:Bis(N-hydroxysulfosuccinimide) Esters of Two Dicarboxylic acids Are Hydrophilic, Membraneimpermeant, Protein Cross-linkers, Biochemistry, 1982, 21, 3950.
2) P. S. R. Anjaneyulu, James V. Staros, Reactions of N-Hydroxysulfosuccinimide Active Esters, Int. J. Peptide Protein Res., 1987, 30, 117.
3) Y. Fukami, K. Sato, K. Ikeda, K. Kamisango, K. Koizumi and T. Matsuno, Evidence for Autoinhibitory Regulation of the c-src Gene Product a Possible Interaction Between the Src Homology 2 Domain and Autophosphorylation Site, J. Biol. Chem., 1993, 268, 1132.