Recombinant proteins for S-phase cyclin A associated protein in the ER are available from various sources. In humans, this protein has a Uniprot ID of Q9BY12 and has an annotated function: 'CCNA2/CDK2 regulatory protein that transiently maintains CCNA2 in the cytoplasm.' This protein is 1400 amino acids in length and 158.3 kilodaltons in mass. It has been designated a subcellular localization as: nuclear. This protein is encoded by the gene SCAPER. Other names also exist, such as: S phase cyclin A-associated protein in the endoplasmic reticulum, zinc finger protein 291. As many as 3 isoforms have been named. This protein is conserved in other species, including: mouse, rat.