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  • Title: Development of a homologous transformation system for Aspergillus parasiticus with the gene encoding nitrate reductase.
    Author: Horng JS, Chang PK, Pestka JJ, Linz JE.
    Journal: Mol Gen Genet; 1990 Nov; 224(2):294-6. PubMed ID: 2277647.
    Abstract:
    The nitrate reductase structural gene (niaD) and an niaD mutant strain were isolated from Aspergillus parasiticus and used to develop a homologous transformation system. A transformation frequency of 110 to 120 transformants per microgram linear DNA was obtained with the 10.9 kb plasmid pSL82, which contained the niaD gene of A. parasiticus. Plasmid pSL82 was also capable of complementing Aspergillus nidulans FGSC A691, a niaD mutant, though at lower frequencies. Southern hybridization analyses of A. parasiticus niaD transformants showed that the niaD gene of pSL82 had integrated into the fungal genome. In addition, vector (bacterial plasmid) sequences were also present in one of the niaD transformants.
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