Biosynthesis of α and β-Ecdysones from Cholesterol outside the Prothoracic Gland in Bombyx mori

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Science  07 Apr 1972:
Vol. 176, Issue 4030, pp. 51-52
DOI: 10.1126/science.176.4030.51


Labeling experiments have established that cholesterol is converted into α-and β-ecdysones in isolated abdomens of silkworm larvae. Since the isolated abdomens do not contain the prothoracic glands, a doubt is cast on the long-standing principle in insect endocrinology that the prothoracic glands are the source of ecdysone secretion.