For flow cytometry, the mouse mAbs were as follows: anti–HLA-ABC-APC (eBiosciences), anti–CD54-PE and anti–HLA-DR-PECy7 (Beckmann Coulter), anti–PD-L1-PE and anti–PD-L2 (Biolegend), anti–B7-H3 (R&D Systems), anti–B7-H4 (eBiosciences); L243 was used for detection of HLA-DR molecules (17 (link)) and HC10 for labelling of β2m-free HLA heavy chains (18 (link), 19 (link)).
The following antibodies were used for Western blot analysis: mouse anti–Melan-A/MART-1 (Zytomed), mouse anti-Tyrosinase and anti-MITF (Santa Cruz Biotechnology), rabbit anti-DCT/TRP2 (kindly provided by V. Hearing, National Cancer Institute, NIH, Bethesda); mouse anti-STAT1, rabbit anti-phospho(p)STAT1, rabbit anti-JAK1, rabbit anti-GAPDH (Cell Signaling Technology); rabbit anti-IRF1 and mouse anti-β2m (Santa Cruz Biotechnology); rabbit anti-β2m (Sigma); mouse anti-TAP1 (NOB-1) and mouse anti-tapasin (TO-3; ref. 20 (link)); mouse mAb HC10 (18 (link), 19 (link)).