<p num="48">FIELD: pharmaceutics.</p> <p num="49">SUBSTANCE: invention refers to a peptide and can be used in medicine and veterinary science. Disclosed is a biologically active peptide ChMAP-28, which has the amino acid sequence SEQ ID NO 1.</p> <p num="50">EFFECT: disclosed is a novel peptide with high antimicrobial activity against gram-positive and gram-negative bacteria and activity on tumor cells.</p> <p num="51">1 cl, 7 ex, 2 tbl, 6 dwg</p>