Figure 1

Electron spin resonance of melanins of F. pedrosoi. The ESR spectra (A) of control-melanin or TC-melanin present a single anisotropic line at g = 2.0023. In (B), progressive microwave power saturation experiments show that the paramagnetic centres of these melanins do not saturate under the experimental conditions, and also that the control-melanin sample (black line, circles) has a higher spin relaxation rate than the TC-melanin sample (gray line, squares).