Figure 2

ML phylogenetic tree reconstructed based on the minicollagen dataset. Circles indicate node supports. Black circles: 100 ≥ BP ≥ 95, PP = 1.0. Gray circles: 95 > BP ≥ 70, PP = 1.0. White circles: 70 > BP ≥ 50, 1.0 ≥ PP ≥ 0.8. Nodes with a bootstrap support below 20% were collapsed. Blue, green, orange and red branches represent Anthozoa, Medusozoa, Polypodioza and Myxozoa respectively. Group 1 minicollagens are characterized by N-terminal and C-terminal CRDs which follow the pattern CXXXCXXXCXXXCXXXCC. Group 2 is characterized by N-terminal CRDs similar to that of group 1 minicollagens but with variable and different C-terminal CRD patterns. Finally, group 3 is characterized by variable CRD patterns both at the N-terminal and C-terminal [21]. * indicate that Tetracapsuloides Ncol-1 does not have the canonical CRD structure (cf. [16]).