Biosynthesis of indigo precursors in higher plants - Xia, Z.-Q.; Zenk, M.H. (Elsevier)
Contradictory results in the literature concerning the role of l-tryptophan in the biosynthesis of the indigo precursors, indican and isatan B, in four higher plants belonging to four plant families have been resolved. [3-^1^3C]Indole and l-[3-^1^3C]-tryptophan were synthesized by standard techniques. Feeding experiments with the labelled precursors unequivocally showed by ^1^3C NMR and mass spectroscopy, that indole and not l-tryptophan is the biosynthetic precursor for the indoxyl derivatives found in plants.
http://linkinghub.elsevier.com/retrieve/pii/0031-9422(92)83613-4
Keywords: W; V