title: Molecular properties of a granulocyte/macrophage colony-stimulating factor obtained from the serum-free culture of Yoshida sarcoma cell Line YSSF-212T.
abstract: A granulocyte/macrophage colony-stimulating factor (Peak-1 CSF) was partially purified from the medium of a serum-free culture of Yoshida sarcoma cells (Line YSSF-212T). Its elution position in gel-filtration chromatography corresponded to a molecular weight of about 22,000. The factor had an isoelectric point at pH 4.5 and a sedimentation coefficient of 2.3 S. The major part of its activity was not bound by Concanavalin A-Sepharose. Although CSF activity behaved as a single component in the gel-filtration and isoelectrofocussing procedures, subsequently it was resolved into two species by preparative discontinuous polyacrylamide gel-electrophoresis. This resolution indicates microheterogeneity of the CSF molecule. Oxidation with periodate readily inactivated L . P3-cell CSF, but the YSSF-cell CSF was fairly resistant. Moreover, titration with anti-L cell CSF serum showed a definite difference between L . P3-cell CSF and YSSF-cell CSF.
mesh_terms: D000818:Animals; D002460:Cell Line; D002499:Centrifugation, Density Gradient; D002850:Chromatography, Gel; D003115:Colony-Stimulating Factors / Q000302:isolation & purification / Q000494:pharmacology; D004591:Electrophoresis, Polyacrylamide Gel; D006098:Granulocytes / Q000166:cytology; D006358:Hot Temperature; D006801:Humans; D007526:Isoelectric Point; D007739:L Cells; D008264:Macrophages / Q000166:cytology; D008970:Molecular Weight; D010084:Oxidation-Reduction; D010504:Periodic Acid; D051381:Rats; D012517:Sarcoma, Yoshida
chemical_list: D003115:Colony-Stimulating Factors; D010504:Periodic Acid