3334
In this study, we observed unexpectedly by immunohistochemical, Western blotting ( immunoblotting ), and Northern (RNA) blotting assays that CD14 is expressed at high density in human gingival fibroblasts .
 ( cell type: human gingival fibroblasts, None) , ( protein: CD14, None) , ( cell type: gingival fibroblasts, 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:
 ( cell type: human gingival fibroblasts, None) , ( protein: CD14, None) , ( cell type: gingival fibroblasts, None) 