Recombinant proteins for S-phase kinase associated protein 1 are available from various sources. In humans, this protein has a Uniprot ID of P63208. This protein is 163 amino acids in length and 18.7 kilodaltons in mass. This protein is encoded by the gene SKP1. Other names also exist, such as: S-phase kinase-associated protein 1, OCP-2, RNA polymerase II elongation factor-like protein OCP2, SIII, cyclin A/CDK2-associated p19, cyclin-A/CDK2-associated protein p19, organ of Corti protein 2, organ of Corti protein II, p19skp1, transcription elongation factor B polypeptide 1-like. As many as 2 isoforms have been named. This protein is conserved in other species, including: mouse, chimpanzee, guinea pig.