Given the task definition and input, reply with output. 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.

Here we show that forced expression of the lung Kruppel - like transcription factor ( LKLF ) in Jurkat T cells is sufficient to program a quiescent phenotype characterized by decreased proliferation , reduced cell size and protein synthesis and decreased surface expression of activation markers .
transcription factor