Biotin-PEG-SCM, MW 5K is a linear heterobifunctional PEG reagent containing a bitoin and a succinimidyl NHS ester. Biotin binds to avidin and streptavidin with high specificity and affinity. SCM stands for succinimidyl carboymethylester and can easily react with primary amines such as lysine.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.