[Cadaverine is an intermediate in the biosynthesis of arthrobactin and ferrioxamine E (author's transl)]

Cadaverin was more readily incorporated than lysine into arthrobactin from Arthrobacter pascens and into ferrioxamin E from Streptomyces glaucescens. From a racemic mixture only the L-isomer of lysine is incorporated. The L-lysine decarboxylase activity was measured in vivo and in vitro. The enzyme from Arthrobacter pascens is not inducable by lysine and completely repressed by 5.10(-6) M Fe3+. In Klebsiella pneumoniae, the producer of aerobactin, only a very low activity of L-lysine decarboxylase was detected.