// Constraints to keep the conserved histidines H7 H9 H40 H101 H131
// H164 H194 and the conserved E73 and D192
// expected to be involved in metal binding close together in the C'
// end of the barrel 
 Constraint H7.ND1	H9.ND1  	0 4 8	
// Constraint H7.ND1	H40.ND1 	0 4 8	
// Constraint H7.ND1	H101.ND1 	0 4 8	
// Constraint H7.ND1	H131.ND1 	0 4 8	
// Constraint H7.ND1	H164.ND1 	0 4 8	
 Constraint H7.ND1	H194.ND1 	0 4 8	

 Constraint H9.ND1	H40.ND1 	0 4 8	
// Constraint H9.ND1	H101.ND1 	0 4 8	
// Constraint H9.ND1	H131.ND1 	0 4 8	
// Constraint H9.ND1	H164.ND1 	0 4 8	
// Constraint H9.ND1	H194.ND1 	0 4 8	
 
 Constraint H40.ND1	H101.ND1 	0 4 8	
// Constraint H40.ND1	H131.ND1 	0 4 8	
// Constraint H40.ND1	H164.ND1 	0 4 8	
// Constraint H40.ND1	H194.ND1 	0 4 8	
 
Constraint E73.OE1	D192.OD1 	0 6 20
Constraint E73.OE1	H101.ND1 	0 6 20	
Constraint E73.OE1	H131.ND1 	0 6 20	
Constraint E73.OE1	H164.ND1 	0 6 20	
Constraint E73.OE1	H194.ND1 	0 6 20	
Constraint H101.ND1	D192.OD1 	0 6 20	
Constraint H131.ND1	D192.OD1 	0 6 20	
Constraint H40.ND1	D192.OD1 	0 6 20	
Constraint H40.ND1	E73.OE1 	0 6 20	
Constraint H7.ND1	D192.OD1 	0 6 20	
Constraint H7.ND1	E73.OE1 	0 6 20	
Constraint H9.ND1	D192.OD1 	0 6 20	
Constraint H9.ND1	E73.OE1 	0 6 20	
 
 Constraint H101.ND1	H131.ND1 	0 4 8	
// Constraint H101.ND1	H164.ND1 	0 4 8	
// Constraint H101.ND1	H194.ND1 	0 4 8	
 
 Constraint H131.ND1	H164.ND1 	0 4 8	
// Constraint H131.ND1	H194.ND1 	0 4 8	

 Constraint H164.ND1	D192.OD1 	0 4 8	
 Constraint H164.ND1	H194.ND1 	0 4 8	

Constraint D192.OD1	H194.ND1 	0 4 8