We observed that salivary gland tumors that developed from both the Line 1 and Line 2 contained a mixture of mucin-secreting cells, epidermoid cells, and intermediate cells with various levels of cyst growth (Figure 3, A and B, and Supplemental Figure 7, A and B), a histological feature characteristic of human MEC. Here, MUC5AC is linked to tumor of salivary gland.