| http://www.w3.org/ns/prov#value | - A further aspect of the present invention is a method of making transgenic plant cell having reduced quinolate phosphoribosyl transferase (QPRTase) expression, by providing a plant cell of a type known to express quinolate phosphoribosyl transferase; transforming the plant cell with an exogenous DNA construct comprising a promoter and DNA comprising a portion of a sequence encoding quinolate phosp
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