Sequence alignment between 1z91(A) and UniProt seq O34777 (OHRR_BACSU):

O34777 (OHRR_BACSU): Organic hydroperoxide resistance transcriptional regulator from Bacillus subtilis (strain 168)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MENKFDHMKLENQLCFLLYASSREMTKQYKPLLDKLNITYPQYLALLLLWEHETLTVKKMGEQLYLDSGTLTPMLKRMEQQGLITRKRSEEDERSVLISLTEDGALLKEKAVDIPGTILGLSKQSGEDLKQLKSALYTLLETLHQKN
         ..............X....................................................................................................................................
PDB seq: -------MKLENQLSFLLYASSREMTKQYKPLLDKLNITYPQYLALLLLWEHETLTVKKMGEQLYLDSGTLTPMLKRMEQQGLITRKRSEEDERSVLISLTEDGALLKEKAVDIPGTILGLSKQSGEDLKQLKSALYTLLETLH---
                --+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----   
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140