8656
Then bone marrow cells from transgenic mice were plated onto MS-5 stromal cells expressing the membrane form of human CSF-1 ( 2M-1 cells ) in order to combine the hematopoietic supporting properties of stromal cells and the proliferative effects of CSF-1 .
 ( protein: human CSF-1, None) , ( protein: CSF-1, None) , ( protein: CSF-1, None) , ( cell type: stromal cells, None) , ( cell type: bone marrow cells, None) , ( cell line: 2M-1 cells, None) , ( protein: membrane form, 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: human CSF-1, None) , ( protein: CSF-1, None) , ( protein: CSF-1, None) , ( cell type: stromal cells, None) , ( cell type: bone marrow cells, None) , ( cell line: 2M-1 cells, None) , ( protein: membrane form, None) 