Fig. 6

Optimization of melanin production conditions. A The effect of medium type, medium pH and incubation temperature, B Effect of different Nitrogen sources and different concentrations of yeast as optimal nitrogen source, C Effect of different Carbon sources and variable concentrations of glucose as optimal carbon source, and D The effect of diverse incubation periods on melanin production. Data are presented as mean ± SEM from three independent experiments P ≤ 0.05