Chain identifier should be blank not A: ATOM   3858 NI    NI A 482      -3.029   8.054 -16.796  1.00 21.39      A   NI  
Unknown residue  NI: ATOM   3858 NI    NI   482      -3.029   8.054 -16.796  1.00 21.39      A   NI  
Chain identifier should be blank not B: ATOM   3883 NI    NI B 483     -34.165  11.302 -21.496  1.00 26.88      B   NI  
Unknown residue  NI: ATOM   3883 NI    NI   483     -34.165  11.302 -21.496  1.00 26.88      B   NI  
Chain identifier should be blank not C: ATOM   3908 NI    NI C 484     -20.938 -15.365  -3.524  1.00 58.55      C   NI  
Unknown residue  NI: ATOM   3908 NI    NI   484     -20.938 -15.365  -3.524  1.00 58.55      C   NI  

1