Table 1. Statistical significance of the pairwise alignment of hemerythrin and hemerythrin-like sequences with annelid hemerythrins.

Reference sequence (Sequence source)	Subject sequence (Sequence source)	E()	% identity
2MHR (Themiste hennahi)	1I4Y (Phascolopsis gouldii)	8e-22	45.8
	4XPX (Methylococcus capsulatus)	0.00064	27.8
	3AGT, 3AGU, 2AVK, 2AWY (Desulfovibrio vulgaris)	0.00019	26.0
	3U9J, 3U9M, 3V5X, 3V5Y, 3V5Z (Homo sapiens)	NS	NS
1I4Y (Phascolopsis gouldii)	2MHR (Themiste hennahi)	3.5e-23	45.8%
	4XPX (Methylococcus capsulatus)	0.00045	28.3%
	3AGT, 3AGU, 2AVK, 2AWY (Desulfovibrio vulgaris)	0.0058	26.7%
	3U9J, 3U9M, 3V5X, 3V5Y, 3V5Z (Homo sapiens)	NS	NS

PDB: Protein Data Bank. E(): Expect value. NS: No sequences with E() < 1000.