2604
The ZR-75-1 cell line showed an expression of 642 fmol/mg whereas lymphocytes of pregnant women showed an expression < or = 4 fmol/mg.
 ( cell line: ZR-75-1 cell line, 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 line: ZR-75-1 cell line, None) 