Chain identifier should be blank not A: ATOM   3883 ZN    ZN A 490     -32.456  27.866  62.346  1.00 23.85      A   ZN  
Chain identifier should be blank not B: ATOM   3911 ZN    ZN B 491       5.153   3.667  17.209  1.00 20.12      B   ZN  
Chain identifier should be blank not C: ATOM   3949 ZN    ZN C 492      32.485  53.827  29.725  1.00 17.80      C   ZN  

1