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DLS sizes by volume of A) Bare NG and substrate-modified nanogels and B) MMP-9 responsive NGs mPEG350-NG and mPEG750-NG before and after MMP (54 nM) treatment. C) MALDI characterization of substrate containing nanogels 1) mPEG350-NG, 2) mPEG350-NG pretreated with MMP-9 (54 nM), 3) mPEG750-NG, 4) mPE7350-NG pretreated with MMP-9 (54 nM).
