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Tyrosine phosphorylation in human blood lymphocytes was studied as a function of stimulation with concanavalin A (ConA) and treatment of the cells with interferon α2 (IFNα2) and/or an IFN-derived C-terminal synthetic peptide 2438 (amino acid residues 124-138). Both IFNα2 and the peptide 2438 decreased the level of protein tyrosine phosphorylation in the ConA-stimulated cells. In unstimulated cells,...
A biologically active synthetic peptide, 2438, representing the 124-138 amino acid sequence of the human interferon α-2 (IFN α-2) molecule, which is known to possess IFN-like antiproliferative activity, specifically binds to human blood leukocytes. Scatchard plots reveal two different K fd values, for the 'low' and 'high' affinity binding. The interaction of the 125 ...
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