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Trajectories of different nanoparticles based in the intact porcine vitreous: anionic P[EF]-2 nanoparticles (a), anionic P[KF]D,L-2/HEP nanoparticles (b), and cationic P[KF]D,L-2 nanoparticles (c). Nanoparticles based on P[EF]-2 were labeled with Cy5; P[KF]D,L-2-based samples were labeled with Cy3 dye. Scale bar corresponds to 2 µm.
