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 .
 ( protein: NF-AT, None) , ( protein: MKP-1, None) , ( DNA: IL-2 promoter, None) , ( protein: ERK, None) , ( protein: IL-2, None) , ( protein: MKP-1, None) , ( protein: MAP kinase-specific phosphatase, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: NF-AT, None) , ( protein: MKP-1, None) , ( DNA: IL-2 promoter, None) , ( protein: ERK, None) , ( protein: IL-2, None) , ( protein: MKP-1, None) , ( protein: MAP kinase-specific phosphatase, None) 