1.13.11.75	Co2+	the enzyme binds cobalt with the highest affinity	765090	
1.13.11.75	Cu2+	copper can occupy the enzyme metal binding site	765090	
1.13.11.75	Fe2+	enzyme contains an Fe2+-4-His arrangement at the axis of a seven-bladed beta-propeller chain fold covered by a dome formed by six large loops. The Fe2+ is accessible through a long nonpolar tunnel that holds a carotenoid derivative	706756	
1.13.11.75	Fe2+	iron can occupy the enzyme metal binding site and is able to support the enzyme's catalytic activity	765090