Table 1.

Length of Each Intron and Species Median, Average, and Average Excluding the Longest 5% Introns

	Median	Average	Average − 5%	Intron 1	Intron 2	Intron 3	Intron 4	Intron 5	Intron 6	Intron 7	Intron 8	Intron 9	Intron 10	Intron 11	Intron 12	Mean
H. sapiens Meis1	1,419	5,787	2,792	1,868	1,879	577	801	1,437	21,060	47,928	35,648	19,433	1,155	293	2,100	11,182
H. sapiens Meis2				1,255	1,536	674	986	796	9,695	46,811	86,413	53,637	1,366	338	2,257	17,147
H. sapiens Meis3				1,719	214	101	1,550	109	5,169	188	1,961	107	361	—	2,906	13,08
M. musculus Meis1	1,290	4738	2,260	1,861	1,741	567	771	1,394	22,862	46,463	35,893	20,037	1,116	304	2,065	11,256
M. musculus Meis2				671	1,595	719	1,116	733	9,432	48,807	78,382	52,868	1,411	364	2,292	16,533
M. musculus Meis3				1,824	135	92	733	155	2,940	167	1,322	170	538	729	539	779
G. gallus Meis1	806	2,616	1,332	?	?	?	?	>849	>6,084	25,232	25,453	16,211	1,271	188	1,919	11,712
G. gallus Meis2				?	>967	222	1,734	791	10,760	34,904	59,559	54,586	1,439	422	3,103	16,752
T. rubripes Meis1.1	147	568	315	1,491	999	219	425	1,010	7,736	15,920	13,058	10,547	1,832	677	—	4,901
T. rubripes Meis1.2				1,061	388	243	78	70	114	1,051	1,388	1,016	373	145	—	539
T. rubripes Meis2				225	1,604	233	326	371	7,877	18,177	18,491	14,252	912	368	3,260	5,508
T. rubripes Meis3				2,027	301	93	87	84	79	138	371	817	87	—	90	379
C. intestinalis	333	545	365	2,488	4,548	1,349	1,357	363	4,275	4,147	2,197	6,648	101	—	242	2,520
B. floridae	730	1,460	973	177	412	633	701	1,231	3,513	9,733	9,140	9,863	2,580	503	2,552	3,420
S. kowalevskii	n.d.	n.d.	n.d.	274	453	697	1,289	1,943	5,390	9,712	6,089	11,058	1,815	—	—	3,872
S. purpuratus	748	1,624	1,015	297	850	1,965	901	10,371	36,100	29,274	3,725	11,805	6,788	—	—	10,208
D. melanogaster	74	1,123	394	7,616	2,154	9,190	2,091	5,480	23,710	40,688	6,727	2,450	221	—	—	10,033
A. mellifera	120	1,177	334	14,086	8,857	8,878	20,587	9,010	69,950	13,9655	63,262	73,730	21,383	—	—	42,940
T. castaneum	54	1,312	553	4,989	9,963	14,951	1,722	3,163	5,821	28,551	3,236	6,276	629	—	—	7,930
D. pulex	294	491	333	2,689	1845	4,383	1394	1,334	10,586	26,222	1,323	14,569	618	—	—	64,96
I. scapularis	n.d.	n.d.	n.d.	?	18,062	8,679	2356	17,775	63,774	10,0420	31,473	46,591	3,458	—	2,754	29,534
C. elegans	65	302	204	1,411	318	47	—	558	1,122	1,128	312	3,973	—	643	100	961
T. spiralis	n.d.	n.d.	n.d.	922	522	57	134	683	669	1,037	1,436	5,423	193	—	60	1,012
L. gigantea	552	965	662	129	536	1,608	931	804	17,612	17,709	10,687	18,634	1,330	--	182	6,378
C. teleta	299	553	386	1,502	169	505	533	2,883	5,995	13,235	2,197	5,760	124	--	3,361	3,297
N. vectensis	591	961	723	?	304	183	249	381	1,062	3,494	2,409	4,920	—	—	—	16,25
T. adhaerens	278	419	320	?	?	?	2,306	7,825	3,181	?	267	904	—	—	—	2,897
Average bilaterians	495	1,662	851	2,373	2,651	2,520	1,944	2,742	14,340	26,633	16,421	16,843	2,208	434	1,695	8,620

Note.—“?” indicates that the size could not be determined, “>”minimum size, and “—” intron absence. For genome-wide data, “n.d.” indicates that statistics could not be determined due to lack of genome-wide annotation. Introns 6–9 are shown in italics to highlight their consistently longer lengths across bilaterians.