Abstract Background Deubiquitinating enzymes (DUBs) cleave ubiquitin on substrate molecules to maintain protein stability. DUBs reportedly participate in the tumorigenesis and tumour progression of hepatocellular carcinoma (HCC). OTU deubiquitinase 5 (OTUD5). a DUB family member. https://www.roneverhart.com/Viking-K2-Slide-Gate-Opener-SPS-Model/