Abstract
d- and l-lysine-2- 14C were administered to intact Nicotiana glauca plants. Anabasine and pipecolic acid were isolated. The results show that l-lysine is the preferred precursor of anabasine and d-lysine is the preferred precursor of pipecolic acid. This supports Spenser's hypothesis that pipecolic acid and the piperidine alkaloids derived from lysine do not have 6-amino-2-ketohexonoic acid as a common intermediate.
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