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Table 1 Number of C1A and C13 cysteine proteinases and their putative inhibitors.

From: The origin and evolution of plant cystatins and their target cysteine proteinases indicate a complex functional relationship

Organism Cystatins (with 3' extension) Papain-like proteinases Legumain-like proteinases
Ostreococcus tauri 0 (0) 9 0
Ostreococcus lucimarinus 0 (0) 9 0
Chlamydomonas reinhartdii 1 (0) 11 1
Volvox carteri 1 (0) 14 1
Physcomitrella patens 5 (3) 11 4
Selaginella moellendorffii 2 (1) 19 2
Oryza sativa 12 (1) 45 5
Arabidopsis thaliana 7 (2) 32 4
Populus trichocarpa 8 (3) 36 5
Hordeum vulgare 13 (1) 32 5