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Review Question - QID 212861

Cell-Mediated Immunity Important Cytokines in Cellular Immunity QID: 212861 (M1.OMB.19.1)
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QID 212861 (Type "212861" in App Search)
A researcher is studying the circulating factors that are released when immune cells are exposed to antigens. Specifically, she is studying a population of CD2+ cells that have been activated acutely. In order to determine which factors are secreted by these cells, she cultures the cells in media and collects the used media from these plates after several days. She then purifies a small factor from this media and uses it to stimulate various immune cell types. She finds that this factor primarily seems to increase the growth and prolong the survival of other CD2+ cells. Which of the following is most likely the factor that was purified by this researcher?
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