Sequence alignment between 4n4o(D) and UniProt seq Q82V11 (Q82V11_NITEU):

Q82V11 (Q82V11_NITEU): Secreted protein from Nitrosomonas europaea (strain ATCC 19718 / CIP 103999 / KCTC 2705 / NBRC 14298)
                 10        20        30        40        50        60        70        80        90 
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+-
UniProt: MNKVIVAAFVSAFVLGSTATFASGNLESSLAPISAKDMLDYLACKDKKPTDVVKSHTEVENGKIVRVKCGDIVALVQKAREQSGDAWQGGY
PDB seq: ---------------------------SSLAPISAKDMLDYLACKDKKPTDVVKSHTEVENGKIVRVKCGDIVALVQKAREQSG-------
                                    --+---------+---------+---------+---------+---------+----       
                                     30        40        50        60        70        80