Table 2.

Amino acid conservation at comparable ferritin and artemin subunit interfaces

Ferritin interacting chains	Number of amino acids at ferritin subunit interfaces	Number of conserved amino acids at artemin subunit interfaces	Amino acid conservation (%)
F:B	35	18	51
F:V	15	8	53
F:M	3	2	67
F:C	14	11	78
F:O	20	13	65

Subunit interfaces included in the analysis are between chain F and chains B, V, M, C, and O of bullfrog ferritin. Amino acid residues at the ferritin subunit interfaces were identified with ProtorP and compared with the corresponding artemin sequence using the alignment shown in Fig. 1a. Identical amino acids and conserved substitutions are included in the calculation for amino acid conservation (%)