Sequence alignment between 2sak(A) and UniProt seq P68802 (SAK_STAAU):

P68802 (SAK_STAAU): Staphylokinase from Staphylococcus aureus
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MLKRSLLFLTVLLLLFSFSSITNEVSASSSFDKGKYKKGDDASYFEPTGPYLMVNVTGVDGKGNELLSPHYVEFPIKPGTTLTKEKIEYYVEWALDATAYKEFRVVELDPSAKIEVTYYDKNKKKEETKSFPITEKGFVVPDLSEHIKNPGFNLITKVVIEKK
         ............................................................X......................................................................................................
PDB seq: ------------------------------------------SYFEPTGPYLMVNVTGVDSKGNELLSPHYVEFPIKPGTTLTKEKIEYYVEWALDATAYKEFRVVELDPSAKIEVTYYDKNKKKEETKSFPITEKGFVVPDLSEHIKNPGFNLITKVVIEKK
                                                   ----+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
                                                      20        30        40        50        60        70        80        90       100       110       120       130