Table 4

Inhibitory effects of various compounds on PNPH activity

CompoundPNPH Activity
Tranylcypromine, 30 μM21.3  ± 1.0
Coumarin, 22 μM39.0  ± 1.5
Coumarin, 200 μM34.6  ± 1.8

Values are the percentages of control activity (without inhibitor) and are means ± S.E.M. of four human samples (KS27, KS30, KS44, and KS52).