5.4.99.16	Ca2+	123% relative activity at 1 mM	701844	
5.4.99.16	Ca2+	8% activating at 10 mM	748015	
5.4.99.16	Ca2+	hepta-coordinated calcium-ion-binding site located about 13 A from the active site at the interface between domain A and domain B, enzyme binding structure, overview	727598	
5.4.99.16	Ca2+	the Ca2+ site is coordinated by the side chains of Asn105, Asp179 and Glu216 and the backbone O atoms of Tyr213 and Leu214. Many alpha-amylases contain a similar calcium site that involves the conserved asparagine and aspartate residues	746621	
5.4.99.16	Cl-	enzyme binding structure of 4 Cl- ions, overview	727598	
5.4.99.16	Fe2+	114% activity at 1 mM	715078	
5.4.99.16	Fe2+	9% activating at 10 mM	748015	
5.4.99.16	K+	10 mM, 22% increase in activity	681153	
5.4.99.16	K+	activates	748492	
5.4.99.16	Li+	1 mM, slightly enhances the activity (6.7%)	759622