Table 6.

Chr22 coding region exon and intron lengths

Exon length, bp	Mean	Median	Intron length, bp	Mean	Median
Initial exon	162	101	Initial intron	7,876	2,706
Internal exon	138	121	Internal intron	3,071	1,271
Terminal exon	206	132	Terminal intron	2,402	1,050

In Chr22, there are 354 genes with three or more translated exons. There are 310 genes with three or more introns. Data are not available for Chr21.