4716
Expression of the MAP kinase-specific phosphatase , MKP-1 , which blocks ERK activation , inhibited IL-2 promoter and NF-AT -driven transcription stimulated by a calcium ionophore and PMA , and in addition, MKP-1 neutralized the transcriptional enhancement caused by active Raf-1 and MEK1 expression .
 NF-AT, MKP-1, IL-2 promoter, ERK, IL-2, MKP-1, MAP kinase-specific phosphatase
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:
 NF-AT, MKP-1, IL-2 promoter, ERK, IL-2, MKP-1, MAP kinase-specific phosphatase