分子量大小：~20kDa来源：Produced in E. coli.Quantity：107UFormulation：Liquid. 0.2μm-filtered solution in PBS containing 0.5% BSA. Contains no preservatives. Further dilutions should be made with medium containing 1% BSA.生物活性：Induces macrophage differentiation and proliferation of hematopoietic stem cells; maintains indifferentiated state of of embryonic stem (ES) cell cultures; inhibits proliferation of the mouse myeloid cell line M1.