Table 3

Summary of evolutionary scenarios for cross-kingdom gene fusions

Evolutionary mode^*

Number of fusion-linked COG pairs

Cross-kingdom horizontal transfer of a fused gene

31

Independent fusion events

14

Ancestral fusion

2

Uncertain

4

Total

51

^*As indicated in Table 2, the evolutionary scenarios for some of the analyzed COGs included both cross-kingdom horizontal transfer and apparent independent gene fusion within one of the kingdoms.

Yanai et al. Genome Biology 2002 3:research0024.1   doi:10.1186/gb-2002-3-5-research0024