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" ... Dr. Cooke and his colleagues searched the online gene database and tentatively identified these 11 candidate genes from short sequences contained within each. One candidate gene looked particularly promising because its sequence was similar to another gene, now known in the literature as MuPKS, that encodes an enzyme that synthesizes yellow pigments in bacteria and fungi. (MuPKS is a shortened version of its formal name, Melopsittacus undulatus polyketide synthase.) Could this be the yellow psittacofulvin gene that Dr. Cooke and his colleagues were looking for? ... "