Chain identifier should be blank not A: ATOM   2022 ZN    ZN A 257      14.390  20.120 715.310 11.00 11.80      A   ZN  
Chain identifier should be blank not A: ATOM   2023 ZN    ZN A 258      22.500  72.010   7.470 41.00 10.60      A   ZN  

1