Interestingly, infiltration of tumors by CD8+ T cells negatively correlated with levels of TF-antigen residues (studied by ACA fixation) on tumor cells, while positively correlated with levels of β-Gal residues (seen by RPL-Gal4 fixation) on tumor cell lines from melanoma patients (Figure 7B; middle and right panels). The gene discussed is TF; the disease is melanoma.