Figure 4: In vitro PTX release of redox-responsive polymer: ( ) poly(AMPD-BAC)-g-PEG-lipoyl-PTX incubated with 20 M DTT; ( ) poly(AMPD-BAC)-g-PEG-lipoyl-PTX-MMP2 incubated with 20 M DTT; ( ) poly(AMPD-BAC)-g-PEG-lipoyl-PTX-MMP2 incubated with 20 M DTT and MMP-2 enzyme. All tests were performed in triplicates.