Recombinant proteins for S-phase kinase associated protein 2 are available from various sources. In humans, this protein has a Uniprot ID of Q13309. This protein is 424 amino acids in length and 47.8 kilodaltons in mass. It has been designated a subcellular localization as: cytoplasmic, nuclear. This protein is encoded by the gene SKP2. Other names also exist, such as: S-phase kinase-associated protein 2, CDK2/cyclin A-associated protein p45, F-box/LRR-repeat protein 1, S-phase kinase-associated protein 2, E3 ubiquitin protein ligase, p45skp2. As many as 3 isoforms have been named. This protein is conserved in other species, including: mouse, rat, chimpanzee.