FIELD: medicine, peptides, biochemistry. SUBSTANCE: invention relates to novel peptide agents eliciting immunostimulating activity. Invention proposes to use the novel synthetic peptide of structural formula: Trp-Thr-Ala-Glu-Glu-Arg-Gln-Leu as an agent with immunostimulating activity. Activity of peptide Trp-Thr-Ala-Glu-Glu-Arg-Gln-Leu is evident in 10-fold less doses as compared with prototype. Agent can be used in medicine for prophylaxis and treatment of patients with extended immunodeficient states of different etiology and designated for control of immunodeficiency. EFFECT: new peptide indicated above, broadened arsenal, enhanced biological activity. 6 tbl
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