Sequence alignment between 6uhd(C) and UniProt seq P62805 (H4_HUMAN):

P62805 (H4_HUMAN): Histone H4 OS=Homo sapiens OX=9606 GN=H4C1 PE=1 SV=2
                 10        20        30        40        50        60        70        80        90       100   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MSGRGKGGKGLGKGGAKRHRKVLRDNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG
         ............X..........................................................................................
PDB seq: -----KGGKGLGAGGAKRHR-----------------------------------------------------------------------------------
              -----+---------                                                                                   
                  10