TGM1 and skin basal cell carcinoma: Though the authors did not suggest any molecular mechanism for the downregulation of TGM3 in BCC, they proposed that the differentiation-correlated profile, including the correlation of expression between TGM1, TGM3, TGM5, loricrin, and involucrin, is lost in BCC in contrast to normal skin, SCC, and melanoma that was shown using the gene array.