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The current study clearly demonstrates that IL-2 does not induce I kappa B alpha degradation or NF-kappa B activation in primary human T cells that respond to IL-2 by entering the cell cycle and avoiding apoptosis .
 IL-2, I kappa B, primary human T cells, IL-2, NF-kappa B
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 IL-2, I kappa B, primary human T cells, IL-2, NF-kappa B