1.11.1.11	Ba2+	activates the activity of APX from kiwano at 1-10 mM	
1.11.1.11	Ca2+	exogenous calcium enhances rice tolerance to acid rain stress by regulating isozymes composition and transcriptional expression of ascorbate peroxidase	
1.11.1.11	Fe	-	
1.11.1.11	Fe	hemoprotein	
1.11.1.11	Fe2+	in the heme group	
1.11.1.11	Fe2+	in the heme group, activates the activity of APX from kiwano at 1-10 mM	
1.11.1.11	Iron	predominantly five-coordinate high-spin iron	
1.11.1.11	Ni2+	below 0.01 mM, activation, inhibition above