Sequence alignment between 4w9c(A) 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
         ...........................................................X............................X.............................
PDB seq: MDVFLMIRRHKTTIFTDAKESSTVFELKRIVEGILKRPPDEQRLYKDDQLLDDGKTLGEXGFTSQTARPQAPATVGLAFRADDTFEALXIEPFSSPPELPDVM---------------
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---               
                 10        20        30        40        50        60        70        80        90       100