Figure 3. Trunk gap gene expression in M. abdita.
(A) Wild-type mRNA expression patterns for trunk gap genes hunchback (hb), Krüppel (Kr), giant (gt), and knirps (kni) are shown in M. abdita embryos at selected time points (cleavage cycle 12, C12; and C14A, time classes T2/5/8). Embryos are shown in lateral view; anterior is to the left, dorsal up. (B) Space-time plots of gap gene expression in M. abdita (solid lines, filled areas) and D. melanogaster (dashed lines). hb is shown in yellow, Kr in green, gt in blue, kni in red. Lines represent positions of half-maximal expression for median boundaries; error bars for M. abdita data represent 1.5x median absolute deviation (MAD), as in Figure 2B. Lightly coloured hb in T6–T8 represents down-regulation. Time progresses downward in (A) and (B). C12/13: cleavage cycles 12/13; T1–8: time classes within C14A as defined in Wotton et al. (2014) for M. abdita and in Surkova et al. (2008b) for D. melanogaster.