Lin TY et al. found that one kind of G. lucidum recombinant protein inhibited the epithelial to mesenchymal transition (EMT) process by disturbing the function of cell adhesion and focal adhesion kinase (FAK) in lung cancer cells (A549 and CL1-5 human NSCLC adenocarcinoma cell lines and LLC1 Lewis lung carcinoma cell line) (Lin and Hsu, 2016; Sun and Sun, 2019). Here, PTK2 is linked to lung cancer.