While there are many types of different degrons, and a high degree of variability even within these groups, degrons are all similar for their involvement in regulating the rate of a protein's degradation.[9][10][11] Much like protein degradation (see proteolysis) mechanisms are categorized by their dependence or lack thereof on Ubiquitin, a small protein involved in proteasomal protein degradation,[12][13][14] Degrons may also be referred to as “Ubiquitin-dependent"[9] or “Ubiquitin-independent".[10][11]