Mpeg1 is not essential for antibacterial or antiviral immunity, but is implicated in antigen presentation.
Ebrahimnezhaddarzi S, Bird CH, Allison CC, Tuipulotu DE, Kostoulias X, Macri C, Stutz MD, Abraham G, Kaiserman D, Pang SS, et al. Immunol Cell Biol. 2022 Aug; 100(7):529-546. Epub 2022 May 12.