Selim et al. Nanoscale Research Letters 2011, 6:528 http://www.nanoscalereslett.com/content/6/1/528 34. Selim KMK, Guo H, Kang IK: Albumin-conjugated cadmium sulfide nanoparticles and their interaction with KB cells. Macromolecular Research 2009, 17:403. 35. Maysinger D, Lovric J, Eisenberg A, Savic R: Fate of micelles and quantum dots in cells. European Journal of Pharmaceutics and Biopharmaceutics 2007, 65:270. 36. Gupta AK, Berry C, Gupta M, Curtis A: Receptor-mediated targeting of magnetic nanoparticles using insulin as a surface ligand to prevent endocytosis. IEEE Transactions on Nanobioscience 2003, 2:255. 37. Fischer D, Li YX, Ahlemeyer B, Krieglstein J, Kissel T: In vitro cytotoxicity testing of polycations: influence of polymer structure on cell viability and hemolysis. Biomaterials 2003, 24:1121. doi:10.1186/1556-276X-6-528 Cite this article as: Selim et al.: Reduced cytotoxicity of insulin- immobilized CdS quantum dots using PEG as a spacer. Nanoscale Research Letters 2011 6:528. Page 9 of 9 Submit your manuscript to a journal and beneﬁt from: 7 Convenient online submission 7 Rigorous peer review 7 Immediate publication on acceptance 7 Open access: articles freely available online 7 High visibility within the ﬁeld 7 Retaining the copyright to your article Submit your next manuscript at 7 springeropen.com