Table 5. Midline and tracheal motifs identified with MEME.

Motif Name	3Number of enhancers examined	4Number of enhancers containing site	5E value	6Total number of sites	7Length of site
1midline 1	19	9	1.2 e-05	18	22
1midline 2	19	14	7.2 e-34	50	31
1midline 3	19	12	1.2 e-10	25	12
2trachea 1	19	8	1.4 e-10	16	22

MEME analysis was used to identify motifs overrepresented in midline and tracheal enhancers. Three motifs were found in midline enhancers and one in tracheal enhancers (Fig. 10). Results from¹twelve enhancers that drive expression in the midline together with seven enhancers that drive expression in the midline and trachea or ²twelve enhancers that drive expression in the trachea and seven enhancers that drive expression in the midline and trachea are shown, as well as. ³the number of enhancers examined, ⁴number of enhancers containing the motif, ⁵likelihood of finding the motif by chance, ⁶number of times the site was found in all the enhancers examined and. ⁷length of the identified site.