3.4.23.20	Leu-Gly-Leu	inhibits trypsinogen activation, activates cleavage of Leu-Tyr amide	30585	
3.4.23.20	Reagents converting sulfhydryl groups to mercaptides	activate	30595	
3.4.23.20	reduced glutathione	enhances milk clotting activity	30594