Fig. 2
From: Ubiquitin fusion proteins in algae: implications for cell biology and the spread of photosynthesis
The distribution of ubiquitin-NiSOD and ubiquitin-IMP fusions throughout major eukaryote lineages. The cladogram shown is based on Burki et al. (2016). A filled circle represents the presence of a given fusion (NiSOD = green, IMP = blue) within a particular group, while the number inside a circle indicates the number of unique species that contain the ubiquitin fusion protein. A dashed line in the backbone of the tree represents uncertainty in phylogenetic placement of the corresponding lineages. The single ubiquitin-NiSOD fusion shown in Stramenopiles under ‘Other heterotrophs’ corresponds to a sequence from the marine labyrinthulid Aplanochytrium stocchinoi; it is unclear whether this sequence comes from this non-photosynthetic organism or is an algal contaminant (see text)