3.5.4.4	Zn2+	coordinated by His15, His17, His214, and Asp295	669783	
3.5.4.4	Zn2+	the activity found in the enzymes expressed with added Zn(II) and added Fe(II) are 2fold higher than when expressed with Ni(II) or without additional metal	727779	
3.5.4.4	Zn2+	zinc-metalloenzyme, binding structure	669846