Fig. 3From: Design, synthesis, and biological evaluation of symmetrical azine derivatives as novel tyrosinase inhibitorsLineweaver–Burk plot of mushroom tyrosinase enzyme inhibition by different concentrations of 3f in the presence of L-DOPA as a substrate. The reciprocal tyrosinase inhibitory activity was plotted against the reciprocal substrate concentration (double reciprocal plot, n = 3). Km is the Michaelis–Menten constant and Vmax is the maximum reaction velocityBack to article page