A site-directed mutagenesis interrogation of the carboxy-terminal end of Arabidopsis thaliana threonine dehydratase/deaminase reveals a synergistic interaction between two effector-binding sites and contributes to the development of a novel selectable marker.

Abstract excerpt

We fused four mutant omr1 alleles, encoding feedback-insensitive forms of Arabidopsis thaliana biosynthetic threonine dehydratase/deaminase (TD), to the CaMV 35S promoter and transformed these constructs into A. thaliana Columbia wild type plants. The mutant TD forms consisted of our previously isolated double mutant, omr1-1 , and three new site-directed mutants, omr1-5 , omr1-7 , and omr1-8 with single point...

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