Anti-Ng23 antibodies are protein reagents that detect specific antigens. The Ng23 antigen is another term for the human protein mutS homolog 5, encoded by the MSH5 gene. The protein is known to be involved in DNA mismatch repair and meiotic recombination processes. Canonically, it has an amino acid length of 834 residues and a mass of 92.9 kilodaltons. and it is found to be widely expressed, with high levels in testis and ovary, including granulosa cells. The Ng23 protein is a member of the DNA mismatch repair MutS protein family.