mPEG-CH2COOMe

Methoxy-poly(ethylene glycol)-methyl-protected carboxymethyl (mPEG-CH2COOMe) is a monofunctional precision PEG derivative with a defined chain length. One end bears a methoxy group. The other end bears a methyl-ester-protected carboxymethyl group. Discrete chain lengths with different degrees of polymerization are available. The methyl ester remains available for subsequent ester transformations, allowing a conjugatable carboxyl group to be introduced after other linking steps. Capping one end defines the direction of derivatization, enabling the hydrophilic PEG segment to be attached to a target molecule and functional linkers of the required length to be constructed.

Customization available.