Streptomyces lividans ZX7 transformed with a similar to 40 KB fragment of S, murayomaensis DNA produces the kinamycin biosynthetic intermediates kinobscurinone (I) and stealthin C (2a), as well as seongomycin (3), which had been previously observed in S, murayamaensis UV mutant MCl. (C) 1997 Elsevier Science Ltd.