Anti-SB140 antibodies enable researchers to detect and measure the SB140 antigen in biological samples. This target is a reported synonym of the YIPF5 gene, which encodes Yip1 domain family member 5. This protein is known to function in Golgi transport and protein transport, among other biological roles. The human version of SB140 has a canonical amino acid length of 257 residues and a protein mass of 28 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the ER, Golgi, and cytoplasmic vesicles of cells and widely expressed in many tissue types. SB140 is a member of the YIP1 protein family.