Sequence alignment between 4znb(A) and UniProt seq P25910 (BLAB_BACFG):

P25910 (BLAB_BACFG): Metallo-beta-lactamase type 2 from Bacteroides fragilis
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MKTVFILISMLFPVAVMAQKSVKISDDISITQLSDKVYTYVSLAEIEGWGMVPSNGMIVINNHQAALLDTPINDAQTEMLVNWVTDSLHAKVTTFIPNHWHGDCIGGLGYLQRKGVQSYANQMTIDLAKEKGLPVPEHGFTDSLTVSLDGMPLQCYYLGGGHATDNIVVWLPTENILFGGCMLKDNQATSIGNISDADVTAWPKTLDKVKAKFPSARYVVPGHGDYGGTELIEHTKQIVNQYIESTSKP
         ................................................XX............................X.....X...........................X...................................................................X....................................................................
PDB seq: --------------------SVKISDDISITQLSDKVYTYVSLAEIEG--MVPSNGMIVINNHQAALLDTPINDAQTETLVNWVADSLHAKVTTFIPNHWHGDCIGGLGYLQKKGVQSYANQMTIDLAKEKGLPVPEHGFTDSLTVSLDGMPLQCYYLGGGHATDNIVVWLPTENILFGGSMLKDNQATSIGNISDADVTAWPKTLDKVKAKFPSARYVVPGHGDYGGTELIEHTKQIVNQYIESTSKP
                             ---------+---------+-------+  ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
                                     30        40      50          60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240