Table 5.

Frequency of different types of alternative splicing in exon-intron borders with or without an antisense transcript

	Total	Alternative borders	Intron retention	Exon skipping	Alternative 3'/5' site
Borders with antisense
Terminal donor	2,578	553	130	7	416
Internal donor	7,632	3,100	535	1,616	949
Terminal acceptor	7,749	3,145	493	1,642	1,010
Internal acceptor	2,763	688	208	7	473
Borders without antisense
Terminal donor	2,200	579	101	32	446
Internal donor	23,414	8,674	1,080	4,997	2,597
Terminal acceptor	23,447	8,787	1,022	5,007	2,758
Internal acceptor	1,732	545	154	16	375