Chain identifier should be blank not A: ATOM   2534 ZN    ZN A 321      46.630 734.840  15.900  1.00  3.60      A   ZN  
Chain identifier should be blank not B: ATOM   2571 ZN    ZN B 322      78.160 440.220 529.500 91.00  6.10      B   ZN  
Chain identifier should be blank not A: ATOM   2535 ZN    ZN A 323      55.480 539.110   8.170 51.00  2.00      A   ZN  
Chain identifier should be blank not B: ATOM   2572 ZN    ZN B 324      68.370 240.940 337.580 31.00  2.00      B   ZN  

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