Purification of immunosuppressive factors extracted from bovine spleen (lymphoid chalone)
- PMID: 152669
- DOI: 10.1111/j.1365-2184.1978.tb00818.x
Purification of immunosuppressive factors extracted from bovine spleen (lymphoid chalone)
Abstract
A low molecular weight immunosuppressive factor FA which is able to reduce the blastic transformation capacity of lymphoid cells from treated mice has been characterized. It was prepared from a bovine spleen acetone powder and found to be associated partly with high molecular weight carriers in the form of an active complex characterized previously as part of a 'lymphoid chalone' fraction. FA may be obtained by selective ultrafiltration of F followed by P-2 Biogel chromatography of the ultrafiltrate. Thymidine, deoxyinosine and deoxycytidine have been identified as the major constituents of FA by mass spectrometry, ultraviolet absorption data and thin layer chromatography. However, none of these nucleotides has the biological activity of FA.
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