Table 2.

Statistics for DNA repeats and non-B DNA-forming motifs in non-B DB

DNA feature	Human 37	Mouse 37	Dog 2	Chimp 2	Macaque 1
G-quadruplex forming repeat	374 545	559 280	492 535	314 171	298 142
Inverted repeat	1 044 533	801 242	814 080	998 249	843 889
Cruciform motif	197 910	188 532	172 032	190 736	128 334
Direct repeat	871 045	1 593 107	968 955	787 335	765 798
Slipped motif	347 969	695 150	404 750	314 516	305 285
Mirror repeat	16 51 723	3 431 486	1 829 867	14 85 135	14 55 025
Triplex motif	1 79 623	618 928	336 642	1 05 640	1 40 580
Z-DNA repeat	294 320	690 276	261 012	278 928	280 982
A-phased repeat	1 130 731	9 09 653	1 241 082	1 085 591	1 098 030

For the current releases of the five mammalian genomes indicated, the motif searches were performed and the number of features for each class was counted. According to Table 1, the cruciform motifs represent a subset of the inverted repeat class, the slipped motifs represent a subset of the direct repeat class and the triplex motif represents a subset of the mirror repeat class.