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  • Title: Genetic transformation of the filamentous yeast, Trichosporon cutaneum, using dominant selection markers.
    Author: Glumoff V, Käppeli O, Fiechter A, Reiser J.
    Journal: Gene; 1989 Dec 14; 84(2):311-8. PubMed ID: 2693213.
    Abstract:
    An efficient transformation system for the filamentous yeast, Trichosporon cutaneum, has been developed. Transformation was obtained with plasmids carrying either the Escherichia coli hygromycin B phosphotransferase-encoding gene (hph) or the Streptoalloteichus hindustanus phleomycin-resistance gene (ble), as dominant selection markers. Expression of both resistance-conferring genes was controlled by the gpd promoter and the trpC terminator, from Aspergillus nidulans. The transformation frequency was up to 500 colonies/micrograms of transforming DNA, using the ble gene, and up to 100 colonies/micrograms of transforming DNA, using the hph gene. Co-transformation frequencies using unselected DNA varied between 50 and 65%. The transforming DNA was found to consist of multiple tandem plasmid copies of high Mr. This polymeric structure, in nonselective media, was mitotically unstable, possibly indicating that it existed in an episomal state.
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