SEARCH Articles Figures Tables E2 Enzymes Dedicated to Ubiquitin-like Proteins (UbLs) E2 ubiquitin conjugating enzyme Enzymes with Additional Ubiquitin-binding Sites Functional Diversity of Ubiquitin-conjugating Enzymes Ubiquitin Ubiquitinylation Enzymes Ubiquitin, ubiquitination Ubiquitin-activating enzyme Ubiquitin-conjugating enzyme Ubiquitin-conjugating enzyme variant Ubiquitin-ligating enzyme Ubiquitin-ligation enzyme Ubiquitination