TABLE 2.

Catalytic efficiencies of MTFK and other FKBPs to N-suc-Ala-Xaa-Pro-Phe-pNA

Xaa	kcat/Km (μM−1 s−1)a of:
	FKBP				CyP
	MTFKb	Legionella MIPc	E. coli trigger factord	Bovine FKBPe	E. coli CyP 18cyf	Bovine CyPe
Ala	0.20	0.05	0.16	0.05	67.4	3.18
Leu	0.35	1.10	0.43	0.64	23.4	2.70
Leu/Alag	1.75	22.0	2.69	12.8	0.35	0.71

^aThe values were determined by the chymotrypsin-coupled assay (see Materials and Methods) at 10°C. 

^bThis study (15°C for MTFK). 

^cReference 21. 

^dReference 34. 

^eReference 13. 

^fReference 7 (15°C for E. coli CyP 18cy). 

^gThe ratio of k_cat/K_m for N-suc-A-L-P-F-pNA to that for N-suc-A-A-P-F-pNA.