Figure 2

Inter- and intra- element distance of shared full-length elements. (a) Scatterplot of d _intra of the 108 shared pairs. (b) The distribution of d _inter of the shared pairs. Most of the Group-A elements are orthologs and Peak-A is located at 0.0157 (0.6 MYA). Two distributions separate at 0.006 (0.23 MYA). The insert figure gives that d _inter ≤ 0.0014 (53,000 years B.P.) holds in 74% of the Group-B elements,. (c) d _inter and d _intra of the Group-B elements. Each pair of bars represent d _inter (grey column) and d _intra (white column) values of a pair of elements. From left to right, pairs are sorted by their d _intra values. (d) Scatterplot of d _inter versus d _intra of the shared pairs. The two solid lines give d = 0.006 in X- and Y- axis. The dashed line is d _inter = d _intra .