Fig. 7From: Silica Nanoparticles for Intracellular Protein Delivery: a Novel Synthesis Approach Using Green Fluorescent ProteinStability against protein degradation of pure GFP (grey), unlabelled particles mixed with GFP (CUS1US2U, blue), and GFP-doped silica nanoparticles (CFS1FS2F, green). The normalised fluorescence intensity [%] of the emission maximum at 508 nm was plotted against the incubation time [min] with proteinase KBack to article page