SARS-CoV-2 accessory proteins ORF7a and ORF3a use distinct mechanisms to downregulate MHC-I surface expression. - Arshad N; Laurent-Rolle M; Ahmed WS; Hsu JC; Mitchell SM; Pawlak J; Sengupta D; Biswas KH; Cresswell P (BioRxiv : the preprint server for biology, 2022)