The utilization of tryptophan in the biosynthesis of echinulin.
D001230:Aspergillus / Q000378:metabolism*; D002247:Carbon Isotopes; D010879:Piperazines / Q000096:biosynthesis*; D011874:Radiometry; D014364:Tryptophan / Q000378:metabolism*
D002247:Carbon Isotopes; D010879:Piperazines; D014364:Tryptophan