Biotin-PEG-Succinimidyl Valerate (Biotin-PEG-SVA), MW 10K as an active ester biotinylation reagent, it can react efficiently and specifically with lysine and N-terminal amino group, but the conditions must be at pH 7-9 , when the environment is satisfied, it can react to form a stable amide bond.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.
