Figure 1From: Transcriptional double-autorepression feedforward circuits act for multicellularity and nervous system developmentAbundance or avoidance of various classes of FFCs. Schematic diagrams of the representations of appearances of the individual circuits in the real human transcriptional network shown as heatmaps with Z scores (a negative value indicates underrepresentation and a positive value indicates overrepresentation) in comparison with the randomized networks. In each network motif, X denotes an originating regulator; Y, an intermediary regulator; Z, a target gene. The target gene is classified as either an effecter (Ef) or a transcription factor (TF). An arrow indicates positive regulation (also denoted as a P), a line terminated with -| indicates negative regulation (N), and a line terminated with a closed circle represents any mode of regulation. Each autoregulation is indicated with a semicircular line around the corresponding regulator symbol. A gray dashed semicircular line terminated with a gray closed circle represents either presence or absence of any mode of autoregulation. (a) The coherence classification shows marked overrepresentation of coherent type-1 FFCs targeting effecters. (b) A lack of autoregulation on the intermediary regulator critically decreases the abundance of FFCs. (c) The combined classification reveals a significant network motif and antimotifs. (d) The DAR-FFC is illustrated in a circle indicated from the corresponding Z score by an open arrow.Back to article page