Anti-bK250D10.3 antibodies enable researchers to detect and measure the bK250D10.3 antigen in biological samples. This target is a reported synonym of the SEPTIN3 gene, which encodes septin 3. The human version of bK250D10.3 has a canonical amino acid length of 358 residues and a protein mass of 40.7 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and notably expressed in the testis, pancreas, colon, and cerebral cortex. bK250D10.3 is a member of the Septin GTPase protein family.