Summary
Normal and chloroform-extracted human sera, fractionated by Sephadex column chromatography, have been tested for inhibitory activity on granulocyte-macrophage (GM) colony formation. It was found that this activity is connected with lipoproteins (inhibitors of granulocyte-macrophage colony stimulating factor) and low molecular weight substances (7000; 13,000) which can act as specific polypeptide chalones.
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Szmitkowski, M. Serum inhibitory activity on granulocyte-macrophage colony formation. Experientia 39, 771–772 (1983). https://doi.org/10.1007/BF01990319
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DOI: https://doi.org/10.1007/BF01990319