Sequence alignment between 1nqn(B) and UniProt seq P02701 (AVID_CHICK):

P02701 (AVID_CHICK): Avidin from Gallus gallus
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150  
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
UniProt: MVHATSPLLLLLLLSLALVAPGLSARKCSLTGKWTNDLGSNMTIGAVNSRGEFTGTYITAVTATSNEIKESPLHGTQNTINKRTQPTFGFTVNWKFSESTTVFTGQCFIDRNGKEVLKTMWLLRSSVNDIGDDWKATRVGINIFTRLRTQKE
         .........................................................X.XXXXXXXXX........X.................................X......................X..................
PDB seq: --------------------------KCSLTGKWTNDLGSNMTIGAVNSRGEFTGTYTT---------KESPLHGTENTINKRTQPTFGFTVNWKFSESTTVFTGQCFID-NGKEVLKTMWLLRSSVNDIGDDKKATRVGINIFTRL-----
                                   -------+---------+---------+-----         -----+---------+---------+---------+------ --+---------+---------+---------+---     
                                        210       220       230                 250       260       270       280       290       300       310       320