Purity: > 95% by SDS - PAGE Format: Liquid in Phosphate buffered saline (pH7.4), 10% glycerol. Gankyrin is an oncoprotein commonly overexpressed in most hepatocellular carcinomas. Gankyrin interacts with S6 ATPase of the 19S regulatory particle of the 26S proteasome. It is known to play a role in the regulation of the phosphorylation of the retinoblastoma protein by CDK4, and to enhance the ubiquitinylation of p53 by MDM2. Gankyrin consists of 7 ankyrin repeats and is structurally similar to I kappa Bs. Recombinant human Gankyrin was expressed in E.coli and purified by conventional chromatography techniques.