Figure 2.

Genome localization of the rps16 gene(s) encoding the mitochondrial and chloroplast RPS16 proteins in Archeaplastida. Early in Archeaplastida, the mitochondrial rps16 gene was transferred to the nucleus (nuc) and acquired a signal peptide targeting both mitochondrion (mt) and chloroplast (cp). In Glaucophytes and Red Algae, the mitochondrial rps16 gene is always absent whereas it is present in 13 Rhodophyta chloroplast genomes (no plastome sequence available from Glaucophytes). In the core Chlorophyta lineage, none of the 76 species having a fully sequenced chloroplast and mitochondrial genomes have a rps16 gene. In the Streptophyta lineage, no rps16 gene was found in the mitochondrial genomes, whereas the chloroplast rps16 gene may either be functional or loss its functionality (complete gene loss, presence of a pre-mature stop codon or loss of the splicing capacity). Tree was redrawn according to Ref.^97,98