Anti-kud antibodies enable researchers to detect and measure the kud antigen in biological samples. This target is a reported synonym of the TMEM258 gene, which encodes transmembrane protein 258. This protein is known to function in the apoptotic pathway and inflammatory response pathways, among other biological roles. The human version of kud has a canonical amino acid length of 79 residues and a protein mass of 9.1 kilodaltons. It is reported to be localized in the membrane, ER, and cytoplasm of cells and widely expressed in many tissue types. kud is a member of the OST5 protein family.