Sequence alignment between 4x23(C) and UniProt seq P84051 (H2A_DROME):

P84051 (H2A_DROME): Histone H2A from Drosophila melanogaster
                 10        20        30        40        50        60        70        80        90       100       110       120    
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----
UniProt: MSGRGKGGKVKGKAKSRSNRAGLQFPVGRIHRLLRKGNYAERVGAGAPVYLAAVMEYLAAEVLELAGNAARDNKKTRIIPRHLQLAIRNDEELNKLLSGVTIAQGGVLPNIQAVLLPKKTEKKA
PDB seq: ---------------SRSNRAGLQFPVGRIHRLLRKGNYAERVGAGAPVYLAAVMEYLAAEVLELAGNAARDNKKTRIIPRHLQLAIRNDEELNKLLSGVTIAQGGVLPNIQAVLLP-------
                        -----+---------+---------+---------+---------+---------+---------+---------+---------+---------+------       
                            20        30        40        50        60        70        80        90       100       110