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Table 4 Effect of protease inhibitors at 2 mM on miswak protease P1. Each value represents the mean of three experiments ± S.E

From: Purification and characterization of cysteine protease from miswak Salvadora persica

Substrate

Units/mg protein

Relative activity %

Control

321 ± 17.3

100 ± 5.4

PMSF

289 ± 13.4

90 ± 4.2

1,10 Phenathroline

304 ± 13.1

95 ± 4.1

EDTA

293 ± 12.5

91 ± 3.9

p-HMB

71 ± 3.8

22 ± 1.2

Iodoacetamide

118 ± 5.1

35 ± 1.5