Fig. 1. Amino acid sequence analysis and protein structure prediction. (a) Amino acid sequence analysis of HFn, PfFn and PcFn. The red triangle shows the ferroxidase sites, the green triangle shows the threefold channels sites, and the gray triangle shows the fourfold channel sites. (b) The predicted subunit of PcFn with five α-helix: A, B, C, D and E. (c) The predicted 24-mer of PcFn templated by ferritin (PDB ID: 2X17). (d) The local quality estimate of predicted model.