Notably, Lacc6 showed lower pH optimum than Lacc12 with optimum pH values of < 3.0 and 3.5 for Lacc6 and Lacc12, respectively (Fig. 5B). The effects of temperature on laccase activity were also slightly different. Specifically, Lacc12 showed a 5oC higher temperature optimum than Lacc6; however, both enzymes were essentially thermophilic, with optimum temperatures of 45oC and 50oC for Lacc6 and Lacc12, respectively (Fig. 5C).