Increase in electron-transfer properties of melanin in NADH/ferricyanide coupled reaction after exposure to different forms of electromagnetic radiation

50 µg of C. neoformans melanin was used in the reactions; melanin was subjected to 40 min treatment, placed into dry ice following treatments and taken up in the ferricyanide solution immediately before measurements. To exclude contribution of heat component during irradiation of melanin with 250 W light, the samples were placed in 25°C water bath.