Figure 3From: Models of gene gain and gene loss for probabilistic reconstruction of gene content in the last universal common ancestor of lifeThe reference species tree. The reference species tree was constructed using the sequences of 11 universal genes COG00081, COG00093, COG00096, COG00097, COG00099, COG00102, COG00103, COG00197, COG00244, COG00256, COG00533.Back to article page