The ratio between the frequencies of NNA/Ts to NNC/Gs is correlated differently with intron number between (A) E. fasciculatus and (B) O. sativa. NNA/Ts: frequency of SCs having an A and a T in the third position, NNC/Gs: frequency of SCs having a C and a G in the third position. The equivalent ratios for the other genomes investigated are shown in Additional file 3: Figure S2.
Qin et al. BMC Genomics 2013 14:56 doi:10.1186/1471-2164-14-56