Fig. 1From: Advances in redox-responsive drug delivery systems of tumor microenvironmentSchematic representation of disulfide bonds in redox-responsive delivery systems (Reprinted with permission from [20]. Copyright 2014 Royal Society of Chemistry) a Disulfide bonds are present in the backbone. b Disulfide bonds are present in side chains. c Disulfide bonds attached to the surface of nanoparticles. d Disulfide bonds link two moieties. e Shell crosslinked micelles. f Core crosslinked micellesBack to article page