Fig. 4

Domain structure and relationship to similar proteins of a novel protease conserved in echinoderm skeletal proteomes. a Domain organization of the S. purpuratus and P. miniata proteins. b A maximum likelihood tree showing related proteases in multiple species. PM = Patiria miniata, SP = Strongylocentrous purpuratus, Pm = Polyandrocarpa misakiensis, Cg = Crassostrea gigasI, Hs = Homo sapiens, Dp = Daphnia pulex, Cs = Caenorhabditus elegans