Anti-Stamp antibodies enable researchers to detect and measure the Stamp antigen in biological samples. This target is a reported synonym of the TTLL5 gene, which encodes tubulin tyrosine ligase like 5. This protein is known to function in cytoskeleton organization and eye development, among other biological roles. The human version of Stamp has a canonical amino acid length of 1281 residues and a protein mass of 143.6 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the nucleus, cell projections, and cytoplasm of cells. Stamp is a member of the Tubulin--tyrosine ligase protein family.