Figure 2: Temporal evolution of scaling coefficient of gap expression boundaries.

(a–t) Shown are scaling coefficient S profiles for individual gap expression boundaries at the indicated times. Panels are ranked according to the AP registry of the boundaries (top left most anterior, bottom right most posterior). A dotted line denotes S=0 and shaded bands are 95% CI of the linear regression slope (Supplementary Fig. 3). (u) Superimposed plot of S profiles for all the boundaries from a to t (except the fast-decaying hb1), with two colours denoting boundaries located in the anterior (dark red) or the posterior trunk region (purple).