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An Arabidopsis thaliana cDNA bank has been constituted in a Saccharomyces cerevisiae expression vector based on the phosphoglycerate kinase (PGK) promoter and terminator. This bank was used to complement eight S. cerevisiae auxotrophic markers. All of them were corrected. These results confirm the quality of the bank and the feasibility of cloning plant genes by yeast mutant complementation. The cDNA complementing the ura1 yeast mutant was sequenced, analysed and shown to encode a dihydroorotic (DHO) dehydrogenase sequence.
Minét et al. (Fri,) studied this question.