GPX4 and keratoconus: Gene expression of K14/Gpx4 versus Cre– control epidermis demonstrated significant correlation to the psoriatic KC population as a whole, as well as to distinct epidermal KC subpopulations of psoriatic skin determined previously by single-cell transcriptomics (Supplemental Figure 10, A–C, and Supplemental Table 11) (21, 44).