It’s widely known that numerous of physiological and biochemical processes within cells are accomplished by protein. A tiny cell can contain millions of proteins which are translated and synthesized by ribosome. However, after synthesis, these protein molecules often have to undergo post-translational modification, which has important biological significance. Ubiquitinylation is one type of post-translational modification. In other words, after “dressing up” by some “junior partners”, proteins were sent for “mission”….