Description
PLLA(4k)-PEG(5k)-COOH is a PEG linker composed of a poly(lactic-co-glycolic acid) (PLLA) segment with a molecular weight of 4 kDa, followed by a polyethylene glycol (PEG) segment with a molecular weight of 5 kDa, and ending with a carboxylic acid (COOH) group.