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View Article and Find Full Text PDFThe clonal proliferation of antigen-specific T cells during an immune response critically depends on the differential response to growth factors, such as IL-2. While activated T cells proliferate robustly in response to IL-2 stimulation, naïve (quiescent) T cells are able to ignore the potent effects of growth factors because they possess chromatin that is tightly condensed such that transcription factors, such as STAT5, cannot access DNA. Activation via the T cell receptor (TCR) induces a rapid decondensation of chromatin, permitting STAT5-DNA engagement and ultimately promoting proliferation of only antigen-specific T cells.
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