HLA-A and melanoma: Cytofluorographic analysis of A375-M6 melanoma cells stained with the HLA-A-specific mAb LGIII-147.4.1, the HLA-B,C-specific mAb B1.23.2 and the HLA-DR,DQ,DP-specific mAb LGII-612.14 demonstrated a high HLA class I antigen expression and a low HLA class II antigen expression (Figure 1).