| 摘要 |
<p>Antibiotic polypeptide compound, or addition salt thereof, having a molecular weight no greater than 10000 and possessing bactericidal and bacteriolytic activities in respect of Gram-positive bacteria, the said compound comprising within the molecular structure thereof amino acid derivative units of formulae (FORMULA) wherein NH2-R1-COOH, NH2-R2-COOH, NH2-R3-COOH, NH2-R4-COOH, NH2-R5-COOH, NH2-R6-COOH and NH2-R7-COOH respectively represent isoleucine, phenylalanine, alanine, aspartic acid, glutamic acid, lysine and glycine and (FORMULA) represents proline. The invention further provides a process for the preparation of antibiotic polypeptides by the aerobic culturing of a strain of S. epidermidis. The invention also provides compositions comprising antibiotic substances and methods of treatment therewith. The invention further provides a new strain of Staphylococcus epidermidis which produces the antibiotic polypeptides, compositions containing the said strain and a method of cosmetic or prophylactic treatment of the human skin with such compositions. </p> |
