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Table 1
Comparisons of sequence removal via intron (RNA) versus IES (DNA) splicing.
Repeat Pair Sequence^†	Remainder After Removal as		Length Requirements to be Frame-Preserving

	Intron	IES

-X\|GTZAGY... ...XGTZAG\|Y-	XY	XGTZAGY	Zmod3 = 2^‡
-XA\|GTY ... ...XAG\|TY-	XATY	XAGTY	Impossible
-XAGZ\|GTY ... ... XAG\|ZGTY-	XAGZZGTY	XAGZGTY	Zmod3 = 0

^†X, Y, and Z are arbitrary (potentially zero-length) sequences. ^‡Zrefers to the length in nucleotides of sequence Z and ''mod'' refers to the modulo operator.
Chang et al. Biology Direct 2007 2:6 doi:10.1186/1745-6150-2-6

Table 1