Table III.

Phylogenetic distribution for Prx subfamilies

	Number of Speciesa
Subfamily	Archaeal	Bacterial	Eukaryotic
			total	Fungi	Plant	Animal	Other
BCP/PrxQ	34	537	55	30	15		10
AhpC/Prx1 (total)	5	437	153	20	22	72	39
Group 1 (Prx1)	2	187	152	20	22	71	39
Group 2 (AhpC)	3	171	1			1b
Group 3		59
Group 4		20
Prx6	39	181	111	38	15	49	9
Prx5		197	95	34	22	31	8
Tpx		224	1				1
AhpE		22

^aEach species was only counted once even if multiple protein sequences were identified within each subfamily. For instance, H. sapiens would only be counted once in the AhpC/Prx1 subfamily even though H. sapiens contains four distinct Prx proteins that are members of this subfamily. Multiple strains of the same species were only counted once.

^bThe only group2 AhpC identified from eukaryotes (gi number 110768962) is from Apis mellifera, a species of honeybee. This protein is 80% identical to a group2 AhpC/Prx1 from Marinobacter aquaeolei, a type of marine bacteria.