Anti-C4orf22 antibodies enable researchers to detect and measure the C4orf22 antigen in biological samples. This target is a reported synonym of the CFAP299 gene, which encodes cilia and flagella associated protein 299. This protein is suspected to be involved in spermatogenesis. The human version of C4orf22 has a canonical amino acid length of 233 residues and a protein mass of 26.9 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the nucleus and cytoplasm of cells and notably expressed in the fallopian tube and testis.