Pigmentation in Rev3l-deleted interfollicular epidermis with wounding, UV radiation, or TPA application. Pigmentation in Rev3l-deleted interfollicular epidermis with wounding, UV radiation, or TPA application. Fontana-Masson staining of skin sections from BK5.Cre; Rev3l+/lox and BK5.Cre; Rev3l−/lox mice (A) 3 d after wounding, (B) 10 d after UV radiation, or (C) 2 wk after TPA application. Melanin pigment stains black. Distance bar: 100 μm. Sabine S Lange et al. LSA 2018;1:e201800048 © 2018 Lange et al.