Fig. 3
The corresponding hierarchical model which shows the direct regulation of x 8 by gene x 4, and time-delayed regulations of x 8 by genes x 4,x 5,x 7. Context nodes, regulatory genes and the target gene are shown by broken, highlighted and double-line ovals respectively. a The corresponding hierarchical recurrent structure obtained from Fig. 2. b Regulation of the target gene x 8 with connections from context nodes x 1 and x 2