4749
ML-9 had little or no effect on the morphology of U937 cells but increased the expression of monocyte-macrophage lineage-associated surface antigen , CD14 , to some extent.
 ( protein: CD14, None) , ( protein: monocyte-macrophage lineage-associated surface antigen, None) , ( cell line: U937 cells, 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: CD14, None) , ( protein: monocyte-macrophage lineage-associated surface antigen, None) , ( cell line: U937 cells, None) 