title: Purification and NH2-terminal sequence of a plasmacytoma growth factor derived from the murine macrophage cell line P388D1.
abstract: Plasmacytoma growth factor (PCT-GF), a putative macrophage-derived lymphokine essential for the in vitro viability and proliferation of early generation plasmacytomas, was purified from conditioned medium of the murine macrophage cell line P388D1. The purification of PCT-GF was accomplished by a batch concentration on trimethylsilyl-controlled pore glass beads, followed by: gel filtration chromatography; hydrophobic interaction HPLC; and reverse-phase HPLC. SDS-PAGE analysis of the purified PCT-GF revealed a single band of Mr 23,000. The amino terminal sequence of PCT-GF was established as NH2-Pro-Thr-Ser-Gln-Val-Arg-Arg-Gly-Asp-Phe-Thr-Glu-Asp-Thr-Thr-Pro-Asn- Arg-Pro-Val-Tyr-Thr. No significant homology was found between this sequence and proteins in the National Biomedical Research Foundation database, suggesting that PCT-GF is a new lymphokine unrelated to previously described growth and differentiation factors.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002460:Cell Line; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D006133:Growth Substances / Q000235:genetics / Q000302:isolation & purification*; D015850:Interleukin-6; D008222:Lymphokines / Q000235:genetics / Q000302:isolation & purification*; D008264:Macrophages / Q000032:analysis*; D051379:Mice; D010446:Peptide Fragments / Q000302:isolation & purification; D012689:Sequence Homology, Nucleic Acid
chemical_list: D006133:Growth Substances; D015850:Interleukin-6; D008222:Lymphokines; D010446:Peptide Fragments