Sequence alignment between 6h1c(A) and UniProt seq Q03456 (FUR_PSEAE):

Q03456 (FUR_PSEAE): Ferric uptake regulation protein from Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) 
                 10        20        30        40        50        60        70        80        90       100       110       120       130    
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----
UniProt: MVENSELRKAGLKVTLPRVKILQMLDSAEQRHMSAEDVYKALMEAGEDVGLATVYRVLTQFEAAGLVVRHNFDGGHAVFELADSGHHDHMVCVDTGEVIEFMDAEIEKRQKEIVRERGFELVDHNLVLYVRKKK
         .....................................................................................X.....................................X..........
PDB seq: MVENSELRKAGLKVTLPRVKILQMLDSAEQRHMSAEDVYKALMEAGEDVGLATVYRVLTQFEAAGLVVRHNFDGGHAVFELADSGAHDHMVCVDTGEVIEFMDAEIEKRQKEIVRERGFELVDANLVLYVRK--
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--  
                 10        20        30        40        50        60        70        80        90       100       110       120       130