Table 3. Summary of intron statistics.

Total sequences	Total no. of introns	Introns with minimal gap regions	Longest intron (bp)	Average intron length (bp)	No.of introns 20–49 kbp	No. of first introns 20–49 kbp	No. of introns 50–99 kbp	No. of first introns 50–99 kbp	No. of introns >100 kbp	No. of first introns >100 kbp
50,172	147,425	144,579	318,524	2741	5460	1840	699	343	108	63
15,653	49,720	48,720	158,878	2396	1810	592	143	84	18	13