Essential modifications.
D004721:Endoplasmic Reticulum / Q000378:metabolism; D006706:Homeostasis; D006801:Humans; D011499:Protein Processing, Post-Translational; D025841:Small Ubiquitin-Related Modifier Proteins / Q000378:metabolism / Q000502:physiology; D025801:Ubiquitin / Q000378:metabolism*; D054875:Ubiquitination
D025841:Small Ubiquitin-Related Modifier Proteins; D025801:Ubiquitin