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Phylogenetic tree of representative aspartic proteases. The phylogenetic tree was built with a total of 62 and 51 AP aminoacid sequences from S. tuberosum and A. thaliana, respectively, and 6 reference sequences from O. sativa L. (OsAP2), S. tuberosum L. (StAP3), A. thaliana L., C. cardunculos L. (Cardosin A), N. gracilis (Nepenthesin I), and H. vulgare L. signed in bold. Cluster names include typical (a), atypical (b, c, e, f, g, and h), and nucellin-like (d) aspartic proteases.
