Sites of histone Lysine ubiquitination
Site of modification Writers Erasers
H4K91ub1
H2AK119ub E3 ubiquitin-protein ligase RING1, E3 ubiquitin-protein ligase RING2
H2AK121ub
H2BK120ub E3 ubiquitin-protein ligase BRE1A, E3 ubiquitin-protein ligase BRE1B
H2BK121ub