Lipids & Polymers

SPDP-PEG-CH2CO2H, MW 1,000 is a pyridyl disulfide modified polyPEG which can react with thiol moiety to produce a new disulfide bond and generating unreactive pyridine-2-thione as a by product. Reaction between carboxyl and amine can be done in the presence of activating agent, such as HATU/EDC, to generate amide linkage. Reagent grade, for research purpose.

HO-PEG-acid, MW 2,000 is a heterobifunctional PEG polymer which can react with amine in the presence of activating agent, such as HATU or EDC. Reagent grade, for research purpose.

Biotin-PEG-OH, MW 1,000 is a biotynilation PEG reagent which can strongly bind to avidin and streptavidin for protein labeling or purification. Reagent grade, for research purpose.

Biotin-PEG-OH, MW 2,000 is a linear polyPEG for biotinylation. It has strong binding affinity to avidin or streptavidin. The hydroxyl group can further derivatize the compound. Reagent grade, for research purpose.

Biotin-PEG-OH, MW 3,400 can form a strong bond with avidin or streptavidin in biotinylation process. The hydroxyl group can further derivatize the compound. Reagent grade, for research purpose.

Biotin-PEG-OH, MW 5,000 is a PEG polymer with a terminal hydroxyl for biotinylation. Biotin can strongly bind to avidin or streptavidin. The Avidin-biotin complex is the strongest known non-covalent interaction (Kd = 10-15M) between a protein and ligand. The hydroxyl group can further derivatize the compound. Reagent grade, for research purpose.

Fluorescein-PEG-Biotin, MW 2,000 is a polyPEG with green fluorescent probe for staining cells, tissues, biomarkers or nanoparticles. The PEG derivative can strongly bind to avidin or streptavidin for molecular target detection. Reagent grade, for research purpose.

Fluorescein-PEG-Biotin, MW 3,400 is a PEG derivative with fluorescein/FITC dye for labeling biomolecules/nanoparticles or staining cells/tissues. It gives a strong green fluorescence. The biotin allows strong binding with avidin or streptavidin. Reagent grade, for research purpose.

Fluorescein-PEG-Biotin, MW 5,000 is a biotinylated PEG polymer which can bind strongly with avidin or streptravidin for molecul target detection. The green dye can be used in biology for staining cells, tissues, biomarkers or nanoparticles. FITC has peak absorption or excitation at 494 nm and maximum emission at 521 nm. Reagent grade, for research purpose.