Sequence alignment between 1xkp(C) and UniProt seq Q56973 (YSCB_YERPE):

Q56973 (YSCB_YERPE): Chaperone protein YscB from Yersinia pestis
                 10        20        30        40        50        60        70        80        90       100       110       120       130       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MQNLLKNLAASLGRKPFVADKQGVYRLTIDKHLVMLAPHGSELVLRTPIDAPMLREGNNVNVTLLRSLMQQALAWAKRYPQTLVLDDCGQLVLEARLRLQELDTHGLQEVINKQLALLEHLIPQLTPFSVASRVGWN
         .....X........X.....X.........X.................................................................................X........................
PDB seq: -QNLLXNLAASLGRXPFVADXQGVYRLTIDXHLVMLAPHGSELVLRTPIDAPMLREGNNVNVTLLRSLMQQALAWAKRYPQTLVLDDCGQLVLEARLRLQELDTHGLQEVINXQLALLEHLIPQLTP----------
          --------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------          
                 10        20        30        40        50        60        70        80        90       100       110       120