SPDP-Gly-Pro-NHS ester is a linker with SPDP and NHS ester moieties. The SPDP is an amine and thiol reactive crosslinker. It is also membrane permeable, allowing it to participate in intracellular crosslinking reactions. The NHS ester is amine reactive and forms stable amide bonds. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.