Chain identifier should be blank not F: ATOM     40 MG    MG F 344      15.8003373.3009028.700711.00 49.00      F   MG  
Chain identifier should be blank not F: ATOM   2816 MG    MG F 344      19.5008978.300 127.000561.00 47.00      F   MG  
Chain identifier should be blank not F: ATOM     39 MG    MG F 345      18.726  75.712  25.347  1.00 47.87      F   MG  

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