The IL-2 Promoter Luciferase Reporter Lentivirus are replication incompetent, HIV-based, VSV-G pseudotyped lentiviral particles that are ready to be transduced into almost all types of mammalian cells, including primary and non-dividing cells. The particles contain a firefly luciferase gene driven by the human IL-2 promoter. After transduction, activation of the IL-2 signaling pathway in the target cells can be monitored by measuring the luciferase activity.