these gb1/6 cells supported in vitro growth of hematopoietic stem cells forming colony-forming units of spleen cells ( cfu-s ) and of granulocytes , erythrocytes , and macrophage/megakarocytes ( cfu-gemm ) in the absence of detectable growth factors interleukin 3 ( multi-colony-stimulating factor ) , granulocyte/macrophage colony-stimulating factor , granulocyte-stimulating factor , or their poly ( a ) + mrnas .
C0018284
growth
C0079460
granulocyte/macrophage