Abstract
Human gamma (immune) interferon (IFN-gamma) was produced in lymphocyte cultures stimulated with a phorbol ester (12-O-tetradecanoylphorbol 13-acetate) and purified phytohemagglutinin. Physicochemical analysis showed that human IFN-gamma is a glycoprotein with an isoelectric point around 8.6 and an apparent molecular weight of 58,000 +/- 3000. A purification process for IFN-gamma was developed consisting of sequential chromatographic separations on controlled-pore glass, concanavalin A-Sepharose, and Bio-Gel P-200. This purification process resulted in an increase in specific activity from about 10(4) (crude culture fluid) to an estimated 10(7) units per mg of protein with a cumulative recovery of about 40% of the IFN activity.
MeSH Terms
Chromatography, Affinity
Chromatography, Gel
Concanavalin A
Electrophoresis, Polyacrylamide Gel
Humans
Interferons/biosynthesis,isolation & purification
Lymphocytes/drug effects,metabolism
Macromolecular Substances
Molecular Weight
Tetradecanoylphorbol Acetate/pharmacology
Chemicals
Macromolecular Substances
Concanavalin A
Interferons
Tetradecanoylphorbol Acetate
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Yip Y K
Pang R H
Urban C
Vilcek J
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