Figure 2From: The organ-specific expression of terpene synthase genes contributes to the terpene hydrocarbon composition of chamomile essential oilsPhylogenetic tree of terpene synthases from the Asteraceae showing relationships among the isolated chamomile TPS genes. Clusters corresponding to two TPS subfamilies (TPS a and TPS b) are apparent. As an outgroup, a diterpene synthase from primary metabolism was chosen. New terpene synthases from chamomile are written in bold. The alignment was accomplished with the ClustalX algorithm. Trees were inferred with the neighbor-joining method and n = 1000 replicates for bootstrapping. Accession numbers are provided in Additional file 2: Table S2.Back to article page