Anti-dJ281H8.4 antibodies are protein reagents that detect specific antigens. The dJ281H8.4 antigen is another term for the human protein small ubiquitin like modifier 4, encoded by the SUMO4 gene. The protein is reported to be a ubiquitin-like protein, which can be covalently attached to target lysines as a monomer. Canonically, it has an amino acid length of 95 residues and a mass of 10.7 kilodaltons. and it is notably expressed in adult and embryonic kidney. The dJ281H8.4 protein is a member of the Ubiquitin protein family.