Fig. 6From: Amperometric Biosensor of Matrix Metalloproteinase-7 Enhanced by Pd-Functionalized Carbon Nanocompositesa SWV responses of electrochemical detection for MMP-7 in 5 mM [Fe(CN)6]3−/4− phosphate buffered (0.1 M, pH = 7.4) at the concentrations from 100 fg mL−1 to 100 ng mL−1. b Linear calibration curve of current and the logarithm of the concentration of MMP-7. The error bars are standard deviations for n = 3Back to article page