Five representative clones (C1, C2, C3, C8, and C19) were stimulated on anti-CD3/CD28 antibody coated plates for 4 days and then cultured for 35 days. Stimulated clones were classified into 3 different groups based on the activation state such as “actively dividing”, “activated”, and “resting”. Those in “actively dividing” received cytokines on day 1, “activated” received cytokines on day 5, and “resting” received cytokines on day 21. Clones were treated with interferon-gamma (IFN-γ) (10 ng/mL), IL-12 (10 ngmL), IL-4 (1,000 IU/mL) or transforming growth factor-beta (TGF-β) (5 ng/mL) for 4 days. Four days after the treatment, the clones were analyzed for GFP expression by flow cytometry.