Sequence alignment between 1hio(D) and UniProt seq P62801 (H4_CHICK):

P62801 (H4_CHICK): Histone H4 from Gallus gallus
                 10        20        30        40        50        60        70        80        90       100   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MSGRGKGGKGLGKGGAKRHRKVLRDNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG
PDB seq: ---------------------------QGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG
                                    ---+---------+---------+---------+---------+---------+---------+---------+--
                                      30        40        50        60        70        80        90       100