TABLE 5.

Effect of cysteine protease inhibitors on wild-type and Ser120Cys peptidase E

Inhibitor	% Relative activity of peptidase E from:
	Wild type	Ser120Cys mutant
None	100a	100b
Iodoacetate	100	14
NEM	100	7
E-64	100	30

^aOne hundred percent is 1,083 pmol of Asp released min⁻¹ mg⁻¹. 

^bOne hundred percent is 0.11 pmol of Asp released min⁻¹ mg⁻¹.