Immunogen sequence: ECFLNLDPSK TEHLFPKATN GKTQLSGKPT NSSATELSLR NDRAEACERE GFCWNGRASI SRSLELIQNK EPSSK Highest antigen sequence identity to the following orthologs: Mouse - 75%, Rat - 68%. Specifically deubiquitinates histone H2B at 'Lys-120' (H2BK120Ub)