Sequence alignment between 6t90(A) and UniProt seq P68431 (H31_HUMAN):

P68431 (H31_HUMAN): Histone H3.1 from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130      
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
UniProt: MARTKQTARKSTGGKAPRKQLATKAARKSAPATGGVKKPHRYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSSAVMALQEACEAYLVGLFEDTNLCAIHAKRVTIMPKDIQLARRIRGERA
PDB seq: ----------------------------------------RYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSSAVMALQEACEAYLVGLFEDTNLCAIHAKRVTIMPKDIQLARRIRGE--
                                                 ---------+---------+---------+---------+---------+---------+---------+---------+---------+----  
                                                         50        60        70        80        90       100       110       120       130