2356
CD14 Sp1 site oligonucleotides bound preferentially to a 105-kDa Sp1 species , which is present in higher relative levels in monocytic than non-monocytic cells , suggesting that modification of Sp1 , such as phosphorylation, may explain how the Sp1 site mediates monocytic specific promoter activity .
 ( protein: 105-kDa Sp1 species, None) , ( protein: Sp1, None) , ( cell type: non-monocytic cells, None) , ( protein: Sp1, None) , ( cell type: monocytic, None) , ( protein: Sp1, None) , ( protein: CD14, None) , ( protein: Sp1, 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: 105-kDa Sp1 species, None) , ( protein: Sp1, None) , ( cell type: non-monocytic cells, None) , ( protein: Sp1, None) , ( cell type: monocytic, None) , ( protein: Sp1, None) , ( protein: CD14, None) , ( protein: Sp1, None) 