Maximum likelihood phylogeny of the arginase family. Numbers indicate bootstrap support based on 100 replicates. ARG1: Type I arginases; ARG2: Type II arginases. Colored boxes indicate annotated and/or predicted subcellular locations of the proteins: cytoplasm (yellow) and mitochondria (green). There is no subcellular information for the proteins in Anopheles gambiae and Nematostella vectensis.