NCIt definition : Ubiquitin carboxyl-terminal hydrolase 1 (785 aa, 88 kDa) is encoded by the human
USP1 gene. This protein is involved in the deubiquitination of certain monoubiquitinated
DNA repair proteins, including proliferating cell nuclear antigen (PCNA) and Fanconi
anemia group D2 protein (FANCD2).;