G-CSF (Granulocyte Colony Stimulating Factor) is cytokine which accelerates differentiation and multiplication of neutrophilic precursor cell. It is reported that G-CSF is produced in such as fibroblast and endothelial cell, and that the multiplication of G-CSF is accelerated in some solid tumor which has such as leukemia and G-CSF receptor. For research use only, not for use in diagnostic procedures.