Sequence alignment between 4x23(B) and UniProt seq P84040 (H4_DROME):

P84040 (H4_DROME): Histone H4 from Drosophila melanogaster
                 10        20        30        40        50        60        70        80        90       100   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MTGRGKGGKGLGKGGAKRHRKVLRDNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG
PDB seq: ------------------------DNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG
                                 ------+---------+---------+---------+---------+---------+---------+---------+--
                                      30        40        50        60        70        80        90       100