FIG. 3.
PPO activities of M. mediterranea MMB-1R incubated for 30 h in MNG (open bars) and MNG supplemented with 3 mM l-Lys (MNGL) (solid bars), 3 mM l-Arg (shaded bars), or 3 mM DAP (striped bars). TH, tyrosine hydroxylase activity; DO, DOPA oxidase activity; the subscript SDS indicates that those activities have been determined in the presence of SDS. DMPO, dimethoxyphenol oxidase activity. THSDS activity is due mainly to the tyrosinase (PpoB), while DMPO activity is characteristic of the laccase (PpoA). TH, DO, and DOSDS activities are a result of both PPOs in M. mediterranea.