Sequence alignment between 3l73(J) and UniProt seq D0VX27 (D0VX27_CHICK):

D0VX27 (D0VX27_CHICK): Complex III subunit 9 from Gallus gallus 
                 10        20        30        40        50        60 
         ---------+---------+---------+---------+---------+---------+-
UniProt: ALLRQAYSALFRRTSTFALTVVLGAVLFERAFDQGADAIFEHLNEGKLWKHIKHKYEASEE
PDB seq: ALLRQAYSALFRRTSTFALTVVLGAVLFERAFDQGADAIFEHLNEGKLWKHIKHKYEASEE
         ------+---------+---------+---------+---------+---------+----
              10        20        30        40        50        60