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Secreted from activated T cells and macrophages , bone marrow-derived MIP-1 alpha /GOS19 inhibits primitive hematopoietic stem cells and appears to be involved in the homeostatic control of stem cell proliferation .
 ( protein: marrow-derived MIP-1 alpha /GOS19, None) , ( protein: MIP-1 alpha, None) , ( protein: /GOS19, None) , ( cell type: macrophages, None) , ( cell type: T cells, None) , ( cell type: stem cell, None) , ( cell type: activated T cells, None) , ( cell type: primitive hematopoietic stem 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: marrow-derived MIP-1 alpha /GOS19, None) , ( protein: MIP-1 alpha, None) , ( protein: /GOS19, None) , ( cell type: macrophages, None) , ( cell type: T cells, None) , ( cell type: stem cell, None) , ( cell type: activated T cells, None) , ( cell type: primitive hematopoietic stem cells, None) 