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. Author manuscript; available in PMC: 2012 Oct 20.
Published in final edited form as: Adv Drug Deliv Rev. 2012 Jul 20;64(13):1488–1507. doi: 10.1016/j.addr.2012.07.008

Fig. 6.

Fig. 6

Confocal fluorescence and differential interference images of (a) FITC-PEG-lipid-modified HEK293 cells and (b) FITC-treated HEK293 cells. (a) A solution of FITC-PEG-lipid in HBSS was added to an HEK293 cell suspension ([PEG-lipids]=100 μM). (b) An aqueous solution of FITC was added to a HEK293 cell suspension. These pictures were taken within an hour after incubation with PEG-lipids for 2 h. Reproduced, with permission, from Ref. [276].