Table 2: Exoproteinase activity (U, nmol/mg of substrate per minute) of the oomycete P. infestans, fungi R. solani, and F. culmorum in hydrolysis of p-nitroanilides of amino acids and tripeptides (substrate concentration was 0.5 mM).

SubstrateExoproteinases of P. infestans Exoproteinases of R. solani Exoproteinases of F. culmorum

BAPNA4.2 ± 0.172.7 ± 0.071.9 ± 0.06
Z-AALPNA2.1 ± 0.080.5 ± 0.026.7 ± 0.23
Suc-FPNA0 ± 0.000 ± 0.000.4 ± 0.01
Suc-GGFPNA0 ± 0.000 ± 0.000.5 ± 0.01
LPNA0 ± 0.000.1 ± 0.011.1 ± 0.03
Ac-AAAPNA0 ± 0.000.1 ± 0.011.0 ± 0.02