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A) Schematic diagram of preparation of Ni–NTA‐modified mesoporous silica nanoparticles (FMSNs) with surface functionalization by histidine‐tagged TAT–SOD protein, B) refolding of denatured SOD on FMSNs after cell internalization, and C) viabilities of HeLa cells treated with lipopolysaccharide, a ROS inducer, in the presence of FMSN–TAT–SOD or FMSNs. Reproduced with permission.131 Copyright 2013, American Chemical Society.
