“…Hence, microbial melanin has a role to play in bioremediation (McLean et al, 1998) and melanin production offers tremendous untapped potential for immobilization of metals and radionuclides because of its electron shuttling (Turick et al, 2002) and metal sequestration capacities (McLean et al, 1998). For instance microbial melanin is responsible for enhanced adsorption of numerous metals and tributyltin chloride with the fungus Aureobasidium pullulans (Gadd and Mowll, 1985;Gadd et al, 1987Gadd et al, , 1990, Fe(III) reduction and subsequent Fe(II) assimilation by the yeast Cryptococcus neoformans (Nyhus et al, 1997) and U accumulation by a melanin-containing fungus associated with the lichen Trapelia involuta (McLean et al, 1998).…”