Table 1

Gene families for cyclohexadienyl mutase
	Class I^*		Class II^*

Subclass	Function	Acronym^†	Function	Acronym^†

Iα	Chorismate	AroQ	Chorismate	AroH
	mutase		mutase
	Isochorismate	PchB
	mutase
	4-Amino,	PapB
	4-deoxy-
	chorismate
	mutase
Iβ	Chorismate	AroR^‡
	mutase

^Class I and Class II specify independent homology groups (analogs). ^†Chorismate mutases are shown in bold. ^‡In view of the closely related tertiary structures of the Saccharomyces cerevisiae* chorismate mutase and the E. coli AroQ domain of AroQPheA [9], the placement of AroR within class I is consistent with the suggestion of MacBeath et al. [8].
Calhoun et al. Genome Biology 2001 2:research0030.1 doi:10.1186/gb-2001-2-8-research0030