(a) S. miltiorrhiza chromosomes with position of the tanshinone (ferruginol) associated biosynthetic gene cluster (BGC) as well as that of the CYP71D array and individual genes (CPS and CYP76AK1–3) indicated by a red arrow and black triangles, respectively.
(b) Syntenic relationship of the Danshen BGC and CYP71D tandem array with S. splendens. Gene nomenclature follows that previously assigned [9,58,60,66]