We also examined the EZH2 expression in the salivary gland from pSS and non-SS xerostomia controls using immunohistochemistry, which revealed that EZH2 was expressed in salivary gland epithelial cells from pSS and non-SS xerostomia controls as well as in lymphocytes from pSS (Figure 1D). The gene discussed is EZH2; the disease is xerostomia.