TABLE 2.

Number of GC-AG introns in first or inner positions.

	Human
	lncRNAs			PCGs
	#	#GC-AG	%	#	#GC-AG	%
First	23997	1000	4.2	53776	665	1.2
Inner	32585	683	2.1	471373	3686	0.8
Total	56582	1683	3.0	525149	4351	0.8
	Mouse
	lncRNAs			PCGs
	#	#GC-AG	%	#	#GC-AG	%
First	13079	309	2.4	40990	472	1.2
Inner	16532	261	0.4	352798	2745	0.8
Total	29611	570	1.9	393788	3217	0.8