Actinomycete also synthesizes and excretes dark pigments, melanin which is considered a useful
criterion for taxonomical studies. Melanin compounds are irregular, dark brown polymers that are
product by various microorganisms by the fermentative oxidation, and have the radio protective and
antioxidant properties that can effectively protect the living organisms from UV radiation. Melanin is
Int. J. Pure Appl. Sci. Technol., 18(1) (2013), 69-72 70
frequently used in medicine, pharmacology and cosmetic preparations. Biosynthesis of melanin with
tyrosinase transform the tyrosine into L-Dopa which in further converted into dopa chrome and auto
oxidized to indole –5,6-Quinone. The later it is polymerized spontaneously into DOPA –