IFN-ω, although having only one functional form described to date (IFNW1), has several pseudogenes: IFNWP2, IFNWP4, IFNWP5, IFNWP9, IFNWP15, IFNWP18, and IFNWP19 in humans.
O IFN-ω, aínda que del se describiu ata agora só unha soa forma funcional (IFNW1), ten varios pseudoxenes: IFNWP2, IFNWP4, IFNWP5, IFNWP9, IFNWP15, IFNWP18, e IFNWP19 en humanos.