Sequence alignment between 2rn4(A) and UniProt seq Q03026 (INH_PSEAE):

Q03026 (INH_PSEAE): Proteinase inhibitor 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: MSASAKLSRMVCLLCGFFSTGISMASSLILLSASDLAGQWTLQQDEAPAICHLELRDSEVAEASGYDLGGDTACLTRWLPSEPRAWRPTPAGIALLERGGLTLMLLGRQGEGDYRVQKGDGGQLVLRRATP
PDB seq: -------------------------SSLILLSASDLAGQWTLQQDEAPAICHLELRDSEVAEASGYDLGGDTACLTRWLPSEPRAWRPTPAGIALLERGGLTLMLLGRQGEGDYRVQKGDGGQLVLRRATP
                                  ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
                                          10        20        30        40        50        60        70        80        90       100