Pseudomonas aeruginosa mutants unable to assimilate or dissimilate nitrate were isolated. Transduction and reversion analyses of these mutants revealed that single genetic lesions are responsible for the double phenotypes. The mutants were divided into two classes based on the ability to utilize hypoxanthine. It can be concluded from this study that at least two genes are shared between the two nitrate reduction systems.
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Goldflam et al. (1983) studied this question.
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