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(A) Schematic illustration of the synthesis and cytotoxicity of l-GSH-Ag NCs and d-GSH-Ag NCs and the potential molecular mechanism. Reprinted with permission from Ref. 223. Copyright © 2014, the Royal Society of Chemistry. (B) Schematic representation of the biodistribution and renal clearance of GSH- and BSA-protected Au25 NCs. Reprinted with permission from Ref. 225. Copyright © 2012, Elsevier.
