FA-PEG-COOH (MW 3400)

FA-PEG-COOH (MW 3400) (Folate-PEG-COOH (MW 3400) ) is a PEG derivative modified with Folic acid and contains a carboxyl group (-COOH) . This carboxyl group readily forms stable amide bonds with amino groups or ester bonds with hydroxyl groups. Folic acid (-FA) has a high affinity for folate receptors and can be used for targeted drug delivery to cell membrane receptors.