. "Any process in which an organism stops, prevents, or reduces the frequency, rate or extent of peptidase activity, the catalysis of the hydrolysis of peptide bonds in a protein, in a second organism." . . . "negative regulation of peptidase activity in other organism" . "down regulation of peptidase activity in other organism" . "down-regulation of protease activity in other organism" . "downregulation of peptidase activity in other organism" . "inhibition of protease activity in other organism" . "negative regulation of protease activity in other organism" . . . . . . . . .