Figure 2
From: Reverse engineering of gene regulatory networks: a finite state linear model
Left: a graphical representation of a gene. The triangles on the left represent the binding sites b1, b2, b3. The rectangle in the middle represent the control function (in the particular example F(x1,x2,x3) = x1 & x2 & ¬ x3, meaning that the gene is on if and only if the first two binding sites are in attached state, while the third in the detached state), and the diamond on the right represents the substance generator. Right: an example gene network. In this network Γ = {G1, G2}, G1 = ((b1,b2), F1, r1), G2 = ((b3), F2, r2), b1 = (1, a1, d1), b2 = (2, a2, d2), b3 = (1, a3, d3), r1 = (1, r0,1, r1,1), and r2 = (2, r0,2, r1,2). The solid lines can be regarded as connecting the substance produced by the gene to the respective binding sites, while the dotted lines channelling the information about the states of the binding sites and genes. Another interpretation of the lines is that the solid lines transmit real numbers, while dotted ones - boolean values.