Scheme 1 - The pikromycin biosynthetic pathway in S. venezuelae ATCC 15439.
From the following article
John W Giraldes, David L Akey, Jeffrey D Kittendorf, David H Sherman, Janet L Smith & Robert A Fecik
Nature Chemical Biology 2, 531 - 536 (2006) Published online: 10 September 2006
doi:10.1038/nchembio822

Numbers on structures denote atom positions referred to in the text.
