Recombinant proteins for solute carrier family 18 member A1 are available from various sources. In humans, this protein has a Uniprot ID of P54219 and has an annotated function: 'Involved in the transport of biogenic monoamines, such as serotonin, from the cytoplasm into the secretory vesicles of neuroendocrine and endocrine cells.' This protein is 525 amino acids in length and 56.3 kilodaltons in mass. It has been designated a subcellular localization as: ER membrane. This protein is encoded by the gene SLC18A1. Other names also exist, such as: chromaffin granule amine transporter, solute carrier family 18 (vesicular monoamine transporter), member 1, solute carrier family 18 (vesicular monoamine), member 1, solute carrier family 18 member 1, vesicular amine transporter 1. As many as 3 isoforms have been named. This protein is conserved in other species, including: mouse, rat, zebrafish, chimpanzee, guinea pig.