1.14.14.135 additional information challenge with either a glucan elicitor from Phytophthora megasperma f.sp. glycinea or with yeast extract causes strong stimulation of cyclase activity with a maximum at about 24 h after elicitor addition 654324 1.14.14.135 NADH a synergistic effect of NADH, 94% increase in cyclase activity, is observed at low NADPH concentrations of about 0.01 mM 654324