Fig. 5

Conservation of the C. rubrum biomineral proteomes with other anthozoan species. Venn diagram depicts the conservation of the 102 C. rubrum OM proteins within anthozoan species. Among the 102 proteins, 77 share sequence similarity with hexacorallian (Scleractinia and Actiniaria) and octocorallian proteins, 1 (CR_72) is shared between Actiniaria and Octocorallia, and 24 are only found in octocorallians. Among the latter 24, 18 are shared in octocorallians and 6 are specific to C. rubrum. The 18 octocorallian proteins are listed and the 6 C. rubrum specific proteins are detailed as in Fig. 3b (pI: isoelectric point). Sequence names in blue correspond to proteins remarkable for their acidic pI and number of negative charges at pH = 8; names in red correspond to protein remarkable for their alkaline pI and number of positive charges at pH = 8 (see Additional file 3 sheet#2)