The results of multiple gene correlation analyses indicated that there was a significant linear relationship (positive correlation) between the expression of ATF4 in ovarian cancer tissue and the expression levels of GPX4, GSS, KEAP1, NFE2L2, SLC7A11, ATG3, ATG4D, and ATG5 (Figure 5D). The gene discussed is ATG4D; the disease is ovarian carcinoma.