CD274 and neoplasm: To evaluate the potential role of Id1 in tumor-associated immune responses, we used flow cytometry to determine whether stimulation of a human KRAS mutant LUAD cell line (H1792) with IFN-γ, which regulates expression of immunomodulatory molecules on tumor cells [21,22,23], affected the expression of PD-L1 on the cell surface of such human tumor cells (Figure 1B,C).