6-Arm-PEG-FA (MW 5000)

6-Arm-PEG-FA (MW 5000) (6-Arm-PEG-Folate (MW 5000)) is a PEG derivative modified with Folic acid (HY-16637). Polyethylene glycol can increase solubility and stability and reduce the immunogenicity of peptides and proteins. It can also inhibit the nonspecific binding of charged molecules to modified surfaces. Folic acid (-FA) has a high affinity for folate receptors and can be used for cell membrane receptors for targeted dr_ug delivery.