Figure 1.

The Ig Iα1 promoter is activated in nasopharyngeal carcinoma cells. (a) The intact or truncated sequence of the Ig Iα1 promoter was inserted into the pGL3-Basic vector to construct the luciferase reporter plasmids. (b) Ig Iα1 promoter activity in human nasopharyngeal carcinoma cells (CNE1) transfected with luciferase reporter vectors containing the intact or truncated Ig Iα1 promoter. Luciferase activity was measured after 24 h of culture, and at least three independent transfection experiments were performed in triplicate for each experimental construct. Ig, immunoglobulin.