Sequence alignment between 5n4w(B) and UniProt seq Q15370 (ELOB_HUMAN):

Q15370 (ELOB_HUMAN): Elongin-B from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MDVFLMIRRHKTTIFTDAKESSTVFELKRIVEGILKRPPDEQRLYKDDQLLDDGKTLGECGFTSQTARPQAPATVGLAFRADDTFEALCIEPFSSPPELPDVMKPQDSGSSANEQAVQ
         .........XX......XXXX.......................................XXX...........XX...........XXXX...........................
PDB seq: MDVFLMIRR--TTIFTD----STVFELKRIVEGILKRPPDEQRLYKDDQLLDDGKTLGEC---SQTARPQAPAT--LAFRADDTFEA----PFSSPP---------------------
         ---------  ------    --------+---------+---------+---------+   ------+----  ---+-------    ------                     
                                     30        40        50        60        70        80