17-(Bromoacetamido-PEG9-ethylcarbamoyl)heptadecanoic acid is a PEG linker containing a functional bromine group and a functional carboxylic acid group. Terminal carboxylic acids can react with primary amine groups in the presence of an activator such as EDC or HATU to form stable amide bonds, and bromide (Br) is an excellent leaving group.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.