Chain identifier should be blank not A: ATOM   1165 ZN    ZN A1397      40.430 424.770 651.710 91.00 25.20      A   ZN  
Chain identifier should be blank not B: ATOM   1185 ZN    ZN B1398      29.360 372.3506101.520 11.00 20.60      B   ZN  

1