Fig. 4From: Quantifying and controlling bond multivalency for advanced nanoparticle targeting to cellsIntegrin-mediated uptake of polymeric NPs with different amounts of cyclic RGD bound (0–100%) and PEG linker lengths (2, 3.5, and 5 kDa), showing high density NPs with short linker size result in the best cellular uptake. From reference [50]Back to article page