Figure 1.

Activation of Zp-luc by 12-O-tetradecanoylphorbol-13-acetate (TPA) and A23187 in the Epstein–Barr virus (EBV)-negative salivary gland cell line, HSY. The cells were treated with either TPA (1, 5, or 10 ng/ml) or A23187 (0·01, 0·1, or 0·25 µg/ml), or given no treatment (−). After incubation for 24 hr, the cells were harvested, and luciferase activity was assayed. The bar graph illustrates fold activity. *P < 0·05; Mann–Whitney U-test. The error bars represent standard deviation.