Structural studies on the murine granulocyte colony-stimulating factor

Granulocyte-colony stimulating factor (G-CSF) is a glycoprotein hemopoietic growth factor which regulates the production of granulocytes and macrophages. Reversed-phase microbore high-performance liquid chromatography was employed to purify a number of tryptic and Staphylococcus aureus V8 proteinase peptides generated from approximately 400 pmol G-CSF purified from medium conditioned by lungs from mice previously injected with endotoxin. N-Terminal amino-acid sequence analyses were performed on the parent polypeptide and on four tryptic peptides and one Staphylococcus aureus V8 protease peptide, yielding 68 unique amino-acid assignments; this corresponds to approximately 38% of the molecule.