ERBB2 and small cell lung carcinoma: We next performed RNA sequencing and found that genes related to peptide transporters associated with antigen processing (TAP1) and an interferon gamma-mediated inflammatory response, such H2-K1, which is coding for an MHC-I subunit, were strongly enriched upon ERBB2 KO in SCLC cells (Fig. 3f, Supplementary Data 5).