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.
IFN-ω, mada je samo jedna funkcionalna forma opisana do sad (IFNW1), postoji nekoliko pseudogena: IFNWP2, IFNWP4, IFNWP5, IFNWP9, IFNWP15, IFNWP18, i IFNWP19 kod ljudi.