Sequence alignment between 4s1x(C) and UniProt seq A8TXX2 (A8TXX2_9ORTO):

A8TXX2 (A8TXX2_9ORTO): Truncated hemagglutinin (Fragment) from unidentified influenza virus
                 10        20        30        40        50        60        70        80 
         ---------+---------+---------+---------+---------+---------+---------+---------+-
UniProt: FRHQNSEGTGQAADLKSTQAAIDQINGKLNRVIEKTNEKFHQIEKEFSEVEGRIQDLEKYVEDTKIDLWSYNAELLVALEN
         ............................X......XXXX..........................................
PDB seq: ---------------------IDQINGKMNRVIEK----FHQIEKEF----------------------------------
                              -----+--------    -------+                                  
                                  50                  70