Intron Evolution and Information processing in the DNA polymerase α gene in spirotrichous ciliates: A hypothesis for interconversion between DNA and RNA deletion

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\|GT ZAGY... ...XGTZAG\|Y-	XY	XGTZAGY	Z mod3 = 2^‡
-XA\|GT Y ... ...XAG\|TY-	XATY	XAGTY	Impossible
-XAGZ\|GT Y ... ... XAG\|ZGTY-	XAGZZGTY	XAGZGTY	Z mod3 = 0

^† X, Y, and Z are arbitrary (potentially zero-length) sequences.
^‡ Z refers to the length in nucleotides of sequence Z and ''mod'' refers to the modulo operator.

ISSN: 1745-6150