A20—A Bipartite Ubiquitin Editing Enzyme with Immunoregulatory Potential.- The Biology of A20-Binding Inhibitors of NF- κB Activation (Abins).- The Biology of A20-Like Molecules.- Anti-Viral Tetris: Modulation of the Innate Anti-Viral Immune Response by A20.- A20 Expressing Tumors and Anticancer Drug Resistance.- Translational Studies of A20 in Atherosclerosis and Cardiovascular Disease.- A Biomarker of Allograft Outcome: A Showcase in Kidney Transplantation.- A20—An Omnipotent Protein in the Liver: Prometheus Myth Resolved?.- Emerging Roles for A20 in Islet Biology and Pathology.- Single Nucleotide Polymorphisms at the TNFAIP3/A20 Locus and Susceptibility/Resistance to Inflammatory and Autoimmune Diseases.