4.4.1.11	methionine gamma-lyase	Citrobacter freundii ATCC 29063	
4.4.1.15	D-cysteine desulfhydrase	Citrobacter freundii	
4.4.1.16	selenocysteine lyase	Citrobacter freundii	
4.4.1.16	selenocysteine lyase	Citrobacter freundii IRC 0070	
4.4.1.4	alliin lyase	Citrobacter freundii	
5.3.1.24	phosphoribosylanthranilate isomerase	Citrobacter freundii	
5.3.1.24	phosphoribosylanthranilate isomerase	Citrobacter freundii NCTC 6021	
5.3.1.5	xylose isomerase	Citrobacter freundii	
5.6.2.2	DNA topoisomerase (ATP-hydrolysing)	Citrobacter freundii	
7.2.2.15	P-type Ag+ transporter	Citrobacter freundii