Sequence alignment between 4n4i(B) and UniProt seq P84243 (H33_HUMAN):

P84243 (H33_HUMAN): Histone H3.3 from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130      
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
UniProt: MARTKQTARKSTGGKAPRKQLATKAARKSAPSTGGVKKPHRYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSAAIGALQEASEAYLVGLFEDTNLCAIHAKRVTIMPKDIQLARRIRGERA
         ....................................X...................................................................................................
PDB seq: -----------------------------APSTGGVXKPH------------------------------------------------------------------------------------------------
                                      -+---------                                                                                                
                                      30