| 摘要 |
Antibiotic A 41030 was produced by submerged aerobic fermn. of streptomyces virginiae straius NRRL 12525 or NRRL 15156, isolated, and shown to consist of 7 individual factors A-G. The sepd. factors were subjected to structural anal. and structures are presented for 5. The individual factors possess antibacterial activity against penicillin-resistant staphylococci and strepto cocci, enhance ffeed efficiency in ruminants, are growth promotors in chicken and swine, and increase milk prodn. of dairy cows. |
