Sequence alignment between 1s3o(A) and UniProt seq Q04837 (SSBP_HUMAN):

Q04837 (SSBP_HUMAN): Single-stranded DNA-binding protein, mitochondrial from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MFRRPVLQVLRQFVRHESETTTSLVLERSLNRVHLLGRVGQDPVLRQVEGKNPVTIFSLATNEMWRSGDSEVYQLGDVSQKTTWHRISVFRPGLRDVAYQYVKKGSRIYLEGKIDYGEYMDKNNVRRQATTIIADNIIFLSDQTKEKE
         ...................................................................XXXXXXXXX........................................................................
PDB seq: -------------------------LERSLNRVHLLGRVGQDPVLRQVEGKNPVTIFSLATNEMWRS---------DVSQKTTWHRISVFRPGLRDVAYQYVKKGSRIYLEGKIDYGEYMDKNNVRRQATTIIADNIIFLS-------
                                  +---------+---------+---------+---------+-         ---------+---------+---------+---------+---------+---------+-----       
                                 10        20        30        40        50                  70        80        90       100       110       120