Name Human Macrophage Colony-Stimulating Factor (M-CSF) Description Measured in a cell proliferation assay using M-NFS-60 mouse myelogenous leukemia lymphoblast cells, the specific activity shall be not less than 1.5×108 IU/mg Purity ≥ 97% (by SDS-PAGE and HPLC) Endotoxin ≤ 1 EU per mg of purified protein by LAL test Size 10 µg |