Chain identifier should be blank not A: ATOM   2482 ZN    ZN A 324      21.616   8.466  58.042  1.00 66.47      A   ZN  
Chain identifier should be blank not B: ATOM   2516 ZN    ZN B 325      63.153   7.731  45.528  1.00 60.54      B   ZN  

1