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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Biomater Sci. 2013 Oct 9;2(2):156–166. doi: 10.1039/C3BM60142K

Fig.1.

Fig.1

Schematics of NP-EGF preparation. 40nm gold nanoparticles were functionalized with PEG1 and PEG2 to stabilize the NPs and to introduce binding sites (see text). Human EGF was then tethered to these binding sites through the Cu+ catalyzed 1,3-dipolar cyclo-addition reaction.