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The latter class of events is blocked in lymphocytes by the immunosuppressive drugs cyclosporin A and FK506 , which inhibit calcineurin , a Ca2+ -activated serine/threonine phosphatase necessary for the nuclear import of NF-AT transcription factors .
 transcription factors, Ca2+ -activated serine/threonine phosphatase, NF-AT, calcineurin, lymphocytes
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:
 transcription factors, Ca2+ -activated serine/threonine phosphatase, NF-AT, calcineurin, lymphocytes