Table 2.

Distribution of gene loss classes in pairwise comparisons among the post-WGD species

	S. cerevisiae: C. glabrata		S. cerevisiae: S. castellii		C. glabrata: S. castellii
Locus classa	Loci	Percent	Loci	Percent	Loci	Percent
2:2	271	8.5%	357	10.6%	239	8.5%
2:1	168	7.5%	98	7.3%	77	10.0%
1:2	70		146		205
1:1 ortholog	2552	80.0%	2525	75.3%	2102	74.3%
1:1 paralog	127	4.0%	227	6.8%	204	7.2%
Total	3188	100.0%	3353	100.0%	2827	100.0%

^aIn the 2:2 class, both species have kept both copies of the gene at the locus. In the 2:1 class, the first species has kept two copies and the second has lost one, vice versa in the 1:2 class. In the 1:1 ortholog class, both species have lost the same syntenic copy of the gene. In the 1:1 paralog class, one species has lost the copy from track A and the other has lost the paralog from track B