Belongs to the REXO1/REXO3 family. Could be the product of a pseudogene. N-terminally truncated compared to the protein-coding REXO1 gene. Originally thought to encode human GOR47-1, an antigenic epitope identified from the serum of virus infected chimpanzee (see AC P48778), which was apparently also expressed in human and used in ELISA tests to detect hepatitis C virus infection in patients. It turns out that the peptide identified in chimpanzee cannot be produced by human REXO1L1/GOR gene, due to a premature stop codon in the gene (PubMed:11472404) and therefore the basis of the tests remains unclear. However, the same authors provide evidence of the expression of a different N-terminal peptide from the human REXO1L1/GOR gene, the GOR1-125 antigen (PubMed:11472404). Contaminating sequence. Sequence of unknown origin in the N-terminal part.