Abstract

Total messenger RNA was extracted from a human T cell hybridoma, clone H-E4-9, which strongly produced macrophage activating factor for glucose consumption (MAF-G). This messenger RNA gave rise to functional MAF-G when translated in Xenopus laevis oocytes. Isoelectric focusing of culture supernatants of the mRNA-microinjected oocytes and the H-E4-9 cells revealed that the former contained MAF-Gs with isoelectric points of pH 5.0 and 3.0 while the latter contained MAF-Gs with isoelectric points of pH 5.0 and pH 3.3. Sucrose density gradient centrifugation analysis showed that MAF-G mRNA prepared from H-E4-9 cells sedimented at about 11.5 S.

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