ORAI1 and oral cavity squamous cell carcinoma: Lee et al. demonstrated Orai1 protein expression in normal human oral keratinocytes (NHOK cells), precancerous, nontumorigenic immortalized oral epithelial cell lines (NOK-SI, OKF6/tert, and HOK-16B cells) and human oral squamous cell carcinoma (OSCC) cell lines (HOK-16B-BapT, SCC4, SCC9/TNF, UM17b, and YD38 cells) by western blotting analysis [9].