Fig. 3
From: fagin: synteny-based phylostratigraphy and finer classification of young genes
The default fagin decision tree for determining homology classes. The process first asks whether the focal gene has a significant aa match to an annotated protein in the synder-derived search interval of the target genome (green diamond node, gen). If yes, the gene is classified as Agen, otherwise, the next question is asked. This process continues along the decision tree until a homology class (red, rectangular leaf node) is assigned. y, yes; n, no. The tree can be modified or replaced by the user. For example, nodes with other evidence (e.g. proteomic, transcriptomic) or analysis can be added, with associated homology