define S1 	5-7  	
define S2 	10-11 	
define S3 	31-34 	
define S4 	59-66 	
define S5 	81-88 	
define S6 	95-102	
define S7 	130-137	

# template has a Pro at 143, so breaks this strand in two
define S8 	140-146	

define S9 	149-157	
define S10	159-166	
define S11	205-211	
define S12	214-219	
define S13	223-228	
define S14	232-240	

define bind  (145 or 147 or 224)

# these are the binding residues in the 1mzeA template
define tbind	(187 or 189 or 267)
define tmetal	(*.fe)