Deleted entry: ubiquitin-protein ligase. The ubiquitinylation process is now known to be performed by several enzymes in sequence, starting with EC
6.2.1.45 (ubiquitin-activating enzyme E1) and followed by several transfer reactions, including those of EC
2.3.2.23 (E2 ubiquitin-conjugating enzyme) and EC
2.3.2.27 (RING-type E3 ubiquitin transferase)