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Phylogeny of PILS and PIN proteins. PILS proteins are evolutionarily distinct of PIN proteins. Note the two separated subtrees. The Maximum Likelihood phylogenetic analysis was performed in MEGA5 (Tamura et al., 2011) by using PILS and PIN amino acid sequences from algae, Physcomitrella, Selaginella, Brachypodium, and Arabidopsis. For a better visualization the algae and sometimes the Physcomitrella and Selaginella branches were collapsed.
