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The mitogenic principle of escherichia coli lipo protein bone marrow derived lymphocyte mitogenicity n palmitoyl cysteine and n palmitoyl glutamic acid alpha methyl esters

, : The mitogenic principle of escherichia coli lipo protein bone marrow derived lymphocyte mitogenicity n palmitoyl cysteine and n palmitoyl glutamic acid alpha methyl esters. Biochemical & Biophysical Research Communications 92(4): 1389-1396

N-Palmitoyl-cysteine methyl ester and N-palmitoyl-glutamic acid .alpha.-methyl ester, which are analogs to the lipophilic N-terminal part of the lipoprotein from the outer membrane of E. coli, were synthesized and tested for biological activity in an in vitro lymphocyte culture system: in spleen cells from several inbred mouse strains the fatty acid derivatives exhibited mitogenic activity towards B [bone marrow derived] lymphocytes comparable to the effect of lipoprotein, as measured by 3H-thymidine incorporation and by hemolytic plaque assays. These results confirm former investigations, which showed that the mitogenic principle of the lipoprotein molecule resides in its N-terminal fatty acid-containing part. The proper dispersion of the water-insoluble substances was critical for their mitogenic activity. Optimal mitogenicity was obtained by sonicating the substances at concentrations of 0.1 mg/ml in culture medium.

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