In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 Activation of signal transduction and apoptosis in healthy lymphomonocytes exposed to bystander HIV - 1 - infected cells .
HIV - 1

 Tk mRNA is induced following treatment with estrogen .
Tk mRNA

 To determine the effects on transcriptional regulation , U937 cells were transfected with a plasmid containing the HIV - 1 enhancer ( bearing two NF - kappa B sites ) coupled to a chloramphenicol acetyltransferase ( CAT ) reporter .

HIV - 1