From: ElTetrado: a tool for identification and classification of tetrads and quadruplexes
Unimolecular quadruplexes
Op
Oa
Oh
Na
Nh
Mp
Mh
Total
+
105
-
12
11
3
8
147
2
*
13
40
23
27
4
5
6
118
120
35
38
7
14
267