Methyltetrazine-PEG4-NH-Boc contains methyltetrazine and a Boc protecting group. The hydrophilic PEG spacer arm improves water solubility and is transferrable to the labeled molecule, reducing aggregation of labeled proteins stored in solution. The Boc protecting group can be removed under acidic conditions.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.