Studies on the ring-cyclization and ring-expansion enzymes of beta-lactam biosynthesis in Cephalosporium acremonium.
Kupka J, Shen YQ, Wolfe S, Demain AL. Studies on the ring-cyclization and ring-expansion enzymes of beta-lactam biosynthesis in Cephalosporium acremonium. Can J Microbiol. 1983 May; 29(5):488-96.