Figure S6 The expression of PD-L1(A), IFN-γ(B) and IL-10(C) in LX-2 cells that co-cultured with DMEM (Control), DMEM from M2 macrophage, 10 μg/mL proline, 10 μg/mL aspartate, and 10 μg/mL cysteine, respectively.