Tags: Protein.
Ubiquitin conjugation factor E4 A is a protein that in humans is encoded by the UBE4A gene.The modification of proteins with ubiquitin is an important cellular mechanism for targeting abnormal or short-lived proteins for degradation. Ubiquitination involves at least three classes of enzymes: ubiquitin-activating enzymes or E1s ubiquitin-conjugating enzymes or E2s and ubiquitin-protein ligases or E3s.