Figure 4

Sequence distance graph of the TC _[-39,-26] -PLMs present in A. thaliana promoters. For each TC_[-39,-26]-PLM observed in more than 200 A. thaliana promoters, the number of promoters containing the PLM is indicated above the sequence (surrounded data). In red PLMs observed in more than 350 promoters; in orange, PLMs in more than 200 promoters and in black PLMs observed in up to 200 sequences. TC_[-39,-26]-PLMs observed in more than 200 promoters are organized in an oriented and closed graph. Each edge between two PLMs reflects the presence of one substitution leading from one PLM to another. Edges between the less observed PLMs (in black) are not considered. The three seeds of this graph (in bold) are PLMs of which all the directly connected motifs are less frequently observed than the seed-PLMs themselves. Only one graph is possible.