The function of TMSB4X in the skin is particularly relevant to human health, and TMSB4X peptides are being tested in clinical trials for the treatment of dermal ulcers and epidermolysis bullosa, a group of skin-blistering diseases (Goldstein and Kleinman, 2015; Kleinman and Sosne, 2016; Yang et al., 2019). This evidence concerns the gene TMSB4X and epidermolysis bullosa.