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Distribution across promoters of the Arabidopsis, tomato and wheat LSU genes of the UPE-box element involved in S response. The promoter region was defined as the 2-kb sequence upstream of the transcription start site (based on Ensembl Plants v52) of each LSU gene (A). Phylogenetic analysis shows that ortholog genes of the Arabidopsis SLIM1 are present in tomato and wheat genomes (B). SLIM1 is a well-known transcription factor that binds to the UPE-box elements [19,44].
