. 2013 Nov 15;42(4):2391–2404. doi: 10.1093/nar/gkt1138
© The Author(s) 2013. Published by Oxford University Press.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
Comparing G1 with G2 for k = 3: 
, 
, 
.