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Biotransformation is the chemical modification(or alteration) of chemical compounds like amino acids, toxins, xenobiotics and drugs, brought about by an organism to produce bioactive molecules. Penicillium jensenii isolated from soil (rhizosphere zone) was found to be a potent tyrosinase producer. Tyrosinase is capable of bringing about biotransformation of a single amino acid tyrosine to L-DOPA (3, 4- dihydroxyphenylalanine) and alpha methyl DOPA. L-DOPA is converted into dopamine in the brain and body by the enzyme L-aromatic amino acid decarboxylase which is further responsible for all...