7694
However, like normal Ter 119 erythroid cells , these Ter 119 positive cells from transgenic mice still expressed high levels of beta-globin and very low or undetectable glycoprotein IIb and platelet factor 4 megakaryocytic transcripts .
 ( protein: platelet factor 4 megakaryocytic transcripts, None) , ( protein: platelet factor 4, None) , ( protein: glycoprotein IIb, None) , ( cell line: normal Ter 119 erythroid cells, None) , ( protein: beta-globin, None) , ( cell line: Ter 119 positive 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: platelet factor 4 megakaryocytic transcripts, None) , ( protein: platelet factor 4, None) , ( protein: glycoprotein IIb, None) , ( cell line: normal Ter 119 erythroid cells, None) , ( protein: beta-globin, None) , ( cell line: Ter 119 positive cells, None) 