Table 1. General information about sequences used in the Figure 2 alignment.

Subclasses	BioB E.coli	Unk1 M.jannaschii	ThiH E.coli	Unk2 D.vulgaris	PylB M.mazei	CofG M.jannaschii	CofH M.jannaschii	LipA E.coli	MiaB E.coli	MoaA E.coli	NifB A.vinelandii	HemN E.coli	KamA C.subterminal	PflA E.coli	BssD T.aromatica	NrdG E.coli	NirJ P.aeruginosa	SplB B.subtilis
Total number of residues	346	375	376	322	349	361	359	321	474	329	502	457	426	245	331	154	387	342
Number of residues used in alignment		226	211	224	219	227	193	188	198	161	186	185	156	174	234	131	129	143
Sequence identity range within subclass	59–99	54–69	36–95	40–53	44–86	38–68	50–63	47–97	75–99	58–98	55–87	48–99	48–74	47–97	62–80	61–99	99–43	74–90
Number of sequences used in each subclass	32	4	12	11	4	11	11	48	10	22	14	17	14	18	4	19	5	7