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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: J Biomed Mater Res A. 2013 Jul 30;102(2):575–587. doi: 10.1002/jbm.a.34859

FIGURE 2.

FIGURE 2

Schematic illustration of ACPPs. CPP is blocked by a polyanionic peptide covalently attached via a MMP2/9-cleavable linker. Cleavage of the linker induces exposure of CPP and enables cell internalization. Reproduced with permission from Ref. 123.