sentences:  PEGylation
  
  PEGylation (often styled pegylation) is the process of both covalent and non-covalent attachment or amalgamation of polyethylene glycol (PEG, in pharmacy called macrogol) polymer chains to molecules and macrostructures, such as a drug, therapeutic protein or vesicle, which is then described as PEGylated (pegylated).PEGylation is routinely achieved by the incubation of a reactive derivative of PEG with the target molecule.