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SPDP PEG linker is a PEG reagent(crosslinker) , which have a reducible (cleavable) disulfide bond. Pyridyldithiol group enables disulfide linkage with reduced cysteines and other sulfhydryl groups, providing a stable but cleavable bond.
The containing polyethylene glycol (PEG) spacer arms offer greater solubility to the crosslinker and the linked proteins compared to crosslinkers having only hydrocarbon spacers. SPDP reagents produce disulfide-containing linkages that can be cleaved with reducing agents such as dithiothreitol (DTT).
AxisPharm offers a range of high purity SPDP PEG reagents with different linker lengths.Different kinds of PEG Reagents may be available by custom synthesis. Fast delivery – Overnight shipping.

Cat# Name Structure M.W. Purity Pricing
SPDP-PEG-acid
AP10041SPDP acid215.30≥98% Pricing
AP14071SPDP-PEG3-acid347.5≥95% Pricing
AP10427SPDP-PEG4-acid462.58≥95% Pricing
AP10428SPDP-PEG5-acid506.63≥95% Pricing
AP13909SPDP-PEG6-acid550.7≥95% Pricing
AP10429SPDP-PEG7-acid594.74≥95% Pricing
AP10038SPDP-PEG8-acid638.79≥98% Pricing
AP10430SPDP-PEG9-acid682.84≥95% Pricing
AP11430SPDP-PEG12-acid815≥95% Pricing
AP11431SPDP-PEG24-acid1343.64≥95% Pricing
AP11432SPDP-PEG36-acid1872.27≥95% Pricing
AP13479SPDP-Gly-Pro-acid TEA salt369.5≥ 98% Pricing
SPDP-PEG-azide
AP13908SPDP-PEG11-azide768.00≥95% Pricing
SPDP-PEG-NHS-ester
AP10042SPDP acid NHS ester312.37≥98% Pricing
AP11950SPDP-C6-NHS ester425.52≥95% Pricing
AP11951SPDP-C6-Sulfo-NHS ester527.56≥95% Pricing
AP11433SPDP-PEG4-NHS ester559.65≥95% Pricing
AP11832SPDP-C6-Gly-Leu-NHS ester595.73≥95% Pricing
AP11434SPDP-PEG6-NHS ester647.76≥95% Pricing
AP11435SPDP-PEG8-NHS ester735.86≥95% Pricing
AP11436SPDP-PEG12-NHS ester912.07≥95% Pricing
AP13379SPDP-PEG-24-NHS ester1439.7≥95% Pricing
AP13380SPDP-PEG36-NHS ester1968.4≥92% Pricing
SPDP-PEG-SPDP
AP13821SPDP-PEG11-SPDP939.2≥98% Pricing
SPDP-PEG-t-Butyl ester
AP13910SPDP-PEG6-t-butyl ester606.8≥95% Pricing
AP10037SPDP-PEG8-tBu ester694.90≥98% Pricing
SPDP-PEG-TCO
AP10144SPDP-NH-PEG2-TCO497.67≥95% Pricing

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