Anti-SEMAB antibodies enable researchers to detect and measure the SEMAB antigen in biological samples. This target is a reported synonym of the SEMA4A gene, which encodes semaphorin 4A. This protein is known to function in angiogenesis and neuronal development, among other biological roles. The human version of SEMAB has a canonical amino acid length of 761 residues and a protein mass of 83.6 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the lymph node and tonsil. Other names for this target antigen include sema domain, immunoglobulin domain (Ig), transmembrane domain (TM) and short cytoplasmic domain, (semaphorin) 4A.